#647BEB
Closest named color: Cornflower (#6A79F7). oklch(62.1% 0.17 271.9), rgb(100, 123, 235).
Aa
Black text reads best on this color (5.57:1).
About this color
#647BEB is a medium-light, vivid blue. In OKLCH its lightness is 62%, its chroma 0.170 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower (#6A79F7), ΔE 0.021 away. Black text reads best on it, at 5.57:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | vivid (0.170) |
| Temperature | cool |
| Nearest name | Cornflower (#6A79F7) |
| Black text | 5.57:1 |
| White text | 3.76:1 |
Values
| HEX | #647BEB |
| RGB | rgb(100, 123, 235) |
| HSL | hsl(230, 77%, 66%) |
| OKLCH | oklch(62.1% 0.17 271.9) |
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 #647BEB | 3.76:1 | AA large text | Lc -70.5 | Content text, not long reading |
| Black text on #647BEB | 5.57:1 | AA | Lc 39.1 | Non-text elements, placeholder text |
| #647BEB text on white | 3.76:1 | AA large text | Lc 65.0 | Content text, not long reading |
| #647BEB text on black | 5.57:1 | AA | Lc -36.7 | 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
#E4E9FB
oklch(93.6% 0.025 273.5)
-
Step 200
200
#CED8F8
oklch(88.5% 0.045 271.7)
-
Step 300
300
#ADBEF7
oklch(80.9% 0.083 271.6)
-
Step 400
400
#849AF3
oklch(70.7% 0.133 272.1)
-
Step 500
500 (this color)
#647BEB
oklch(62.1% 0.17 271.9)
-
Step 600
600
#5064DD
oklch(55.5% 0.185 271.9)
-
Step 700
700
#4252C0
oklch(49.1% 0.172 272.2)
-
Step 800
800
#36449B
oklch(42.7% 0.142 272.1)
-
Step 900
900
#2E3A7B
oklch(37.6% 0.111 272.2)
-
Step 950
950
#1B2348
oklch(27% 0.069 271.9)
#647BEB 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) | #448AEF | 0.045 |
| Deuteranopia (no green cones) | #2F7EE9 | 0.049 |
| Tritanopia (no blue cones) | #0094A8 | 0.150 |
| Achromatopsia (no color) | #838383 | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #647BEB
#647BEB
oklch(62.1% 0.17 271.9)
- #A28300
#A28300
oklch(62.1% 0.127 92.1)
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 #647BEB, closest first.
No curated palette has a color within ΔE 0.04 of #647BEB.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower #6A79F7 ΔE 0.021
- Soft Blue #6488EA ΔE 0.034
- Medium Slate Blue #7B68EE ΔE 0.052
- Dark Sky Blue #448EE4 ΔE 0.057
- Clear Blue #247AFD ΔE 0.061
- Royal Blue #4169E1 ΔE 0.066
- Lavender Blue #8B88F8 ΔE 0.067
- Cornflower Blue #6495ED ΔE 0.067
Use #647BEB 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.