#647BE5
Closest named color: Cornflower (#6A79F7). oklch(61.7% 0.161 271.7), rgb(100, 123, 229).
Aa
Black text reads best on this color (5.50:1).
About this color
#647BE5 is a medium-dark, vivid blue. In OKLCH its lightness is 62%, its chroma 0.161 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower (#6A79F7), ΔE 0.029 away. Black text reads best on it, at 5.50:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | vivid (0.161) |
| Temperature | cool |
| Nearest name | Cornflower (#6A79F7) |
| Black text | 5.50:1 |
| White text | 3.81:1 |
Values
| HEX | #647BE5 |
| RGB | rgb(100, 123, 229) |
| HSL | hsl(229, 71%, 65%) |
| OKLCH | oklch(61.7% 0.161 271.7) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #647BE5 | 3.81:1 | AA large text | Lc -70.9 | Content text, not long reading |
| Black text on #647BE5 | 5.50:1 | AA | Lc 38.7 | Non-text elements, placeholder text |
| #647BE5 text on white | 3.81:1 | AA large text | Lc 65.4 | Content text, not long reading |
| #647BE5 text on black | 5.50:1 | AA | Lc -36.2 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 500.
-
Step 50
50
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E4E9FA
oklch(93.5% 0.024 272.8)
-
Step 200
200
#CED8F7
oklch(88.4% 0.044 271.3)
-
Step 300
300
#AEBEF4
oklch(80.8% 0.079 271.7)
-
Step 400
400
#859BEF
oklch(70.7% 0.126 271.7)
-
Step 500
500 (this color)
#647BE5
oklch(61.7% 0.161 271.7)
-
Step 600
600
#5166D8
oklch(55.6% 0.175 271.7)
-
Step 700
700
#4254BB
oklch(49% 0.163 271.6)
-
Step 800
800
#364598
oklch(42.6% 0.136 271.7)
-
Step 900
900
#2F3B79
oklch(37.7% 0.106 272.1)
-
Step 950
950
#1B2347
oklch(27% 0.068 271.8)
#647BE5 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #4988E9 | 0.039 |
| Deuteranopia (no green cones) | #377DE3 | 0.044 |
| Tritanopia (no blue cones) | #0F93A5 | 0.144 |
| Achromatopsia (no color) | #838383 | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #647BE5
#647BE5
oklch(61.7% 0.161 271.7)
- #A18200
#A18200
oklch(61.8% 0.126 91.9)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #647BE5, closest first.
No curated palette has a color within ΔE 0.04 of #647BE5.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower #6A79F7 ΔE 0.029
- Soft Blue #6488EA ΔE 0.033
- Dark Sky Blue #448EE4 ΔE 0.055
- Medium Slate Blue #7B68EE ΔE 0.055
- Clear Blue #247AFD ΔE 0.065
- Royal Blue #4169E1 ΔE 0.065
- Cornflower Blue #6495ED ΔE 0.067
- Chefchaouen Blue #4895EF ΔE 0.068
Use #647BE5 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.