#647CD6
Closest named color: Soft Blue (#6488EA). oklch(61% 0.139 270.6), rgb(100, 124, 214).
Aa
Black text reads best on this color (5.39:1).
About this color
#647CD6 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.139 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.040 away. Black text reads best on it, at 5.39:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 5.39:1 |
| White text | 3.89:1 |
Values
| HEX | #647CD6 |
| RGB | rgb(100, 124, 214) |
| HSL | hsl(227, 58%, 62%) |
| OKLCH | oklch(61% 0.139 270.6) |
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 #647CD6 | 3.89:1 | AA large text | Lc -71.7 | Content text, not long reading |
| Black text on #647CD6 | 5.39:1 | AA | Lc 37.9 | Non-text elements, placeholder text |
| #647CD6 text on white | 3.89:1 | AA large text | Lc 66.2 | Content text, not long reading |
| #647CD6 text on black | 5.39:1 | AA | Lc -35.5 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5EAF8
oklch(93.7% 0.02 270.2)
-
Step 200
200
#CFD8F3
oklch(88.4% 0.038 271)
-
Step 300
300
#B0BFEE
oklch(80.9% 0.069 271)
-
Step 400
400
#879DE5
oklch(70.8% 0.109 270.5)
-
Step 500
500 (this color)
#647CD6
oklch(61% 0.139 270.6)
-
Step 600
600
#536ACB
oklch(55.6% 0.152 270.7)
-
Step 700
700
#4458AF
oklch(49.1% 0.14 270.7)
-
Step 800
800
#38488E
oklch(42.6% 0.117 271)
-
Step 900
900
#303D71
oklch(37.6% 0.09 271)
-
Step 950
950
#1C2442
oklch(26.9% 0.057 270.9)
#647CD6 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) | #5686D9 | 0.028 |
| Deuteranopia (no green cones) | #497CD4 | 0.030 |
| Tritanopia (no blue cones) | #2B909F | 0.125 |
| Achromatopsia (no color) | #818181 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #647CD6
#647CD6
oklch(61% 0.139 270.6)
- #9F7F00
#9F7F00
oklch(61% 0.125 91)
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 #647CD6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.040
- Cornflower #6A79F7 ΔE 0.052
- Dark Sky Blue #448EE4 ΔE 0.053
- Windows Blue #3778BF ΔE 0.062
- Cool Blue #4984B8 ΔE 0.063
- Faded Blue #658CBB ΔE 0.067
- Steel Blue #4682B4 ΔE 0.068
- Water Blue #0E87CC ΔE 0.068
Use #647CD6 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.