#63A6CB
Closest named color: Greyblue (#77A1B5). oklch(69.5% 0.087 234.1), rgb(99, 166, 203).
Aa
Black text reads best on this color (7.84:1).
About this color
#63A6CB is a medium-light, moderately saturated blue. In OKLCH its lightness is 69%, its chroma 0.087 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.035 away. Black text reads best on it, at 7.84:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.84:1 |
| White text | 2.67:1 |
Values
| HEX | #63A6CB |
| RGB | rgb(99, 166, 203) |
| HSL | hsl(201, 50%, 59%) |
| OKLCH | oklch(69.5% 0.087 234.1) |
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 #63A6CB | 2.67:1 | Fails | Lc -57.1 | Large or bold text, headings |
| Black text on #63A6CB | 7.84:1 | AAA | Lc 52.2 | Large or bold text, headings |
| #63A6CB text on white | 2.67:1 | Fails | Lc 51.9 | Large or bold text, headings |
| #63A6CB text on black | 7.84:1 | AAA | Lc -50.0 | Large or bold text, headings |
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 400.
-
Step 50
50
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF3
oklch(93.6% 0.016 233)
-
Step 200
200
#C7DDEA
oklch(88.5% 0.03 233.6)
-
Step 300
300
#9FC7DF
oklch(80.9% 0.054 234.7)
-
Step 400
400 (this color)
#63A6CB
oklch(69.5% 0.087 234.1)
-
Step 500
500
#3594C2
oklch(63.1% 0.111 233.7)
-
Step 600
600
#007DAD
oklch(55.6% 0.117 234.3)
-
Step 700
700
#006992
oklch(49.1% 0.103 234.3)
-
Step 800
800
#005678
oklch(42.7% 0.089 233.9)
-
Step 900
900
#0C4762
oklch(37.6% 0.073 234.3)
-
Step 950
950
#0B2A39
oklch(27% 0.045 233.1)
#63A6CB 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) | #94A4CD | 0.056 |
| Deuteranopia (no green cones) | #8699CA | 0.049 |
| Tritanopia (no blue cones) | #27B0B2 | 0.067 |
| Achromatopsia (no color) | #9E9E9E | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63A6CB
#63A6CB
oklch(69.5% 0.087 234.1)
- #C88E68
#C88E68
oklch(69.5% 0.088 54)
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 #63A6CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.035
- Bluegrey #85A3B2 ΔE 0.048
- Bluey Grey #89A0B0 ΔE 0.053
- Turquoise Blue #06B1C4 ΔE 0.055
- Cool Gray #8D99AE ΔE 0.061
- Cadet Blue #5F9EA0 ΔE 0.064
- Cool Steel #97A7B3 ΔE 0.067
- Faded Blue #658CBB ΔE 0.071
Use #63A6CB 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.