#63A4D2
Closest named color: Greyblue (#77A1B5). oklch(69.3% 0.095 240.8), rgb(99, 164, 210).
Aa
Black text reads best on this color (7.77:1).
About this color
#63A4D2 is a medium-light, moderately saturated blue. In OKLCH its lightness is 69%, its chroma 0.095 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.044 away. Black text reads best on it, at 7.77:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.77:1 |
| White text | 2.70:1 |
Values
| HEX | #63A4D2 |
| RGB | rgb(99, 164, 210) |
| HSL | hsl(205, 55%, 61%) |
| OKLCH | oklch(69.3% 0.095 240.8) |
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 #63A4D2 | 2.70:1 | Fails | Lc -57.5 | Large or bold text, headings |
| Black text on #63A4D2 | 7.77:1 | AAA | Lc 51.8 | Large or bold text, headings |
| #63A4D2 text on white | 2.70:1 | Fails | Lc 52.3 | Large or bold text, headings |
| #63A4D2 text on black | 7.77:1 | AAA | Lc -49.6 | 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
#E0ECF5
oklch(93.7% 0.018 240)
-
Step 200
200
#C7DDED
oklch(88.6% 0.032 239.4)
-
Step 300
300
#9FC6E4
oklch(80.9% 0.06 241.6)
-
Step 400
400 (this color)
#63A4D2
oklch(69.3% 0.095 240.8)
-
Step 500
500
#3792CC
oklch(63.2% 0.122 240.8)
-
Step 600
600
#007BB7
oklch(55.7% 0.129 240.7)
-
Step 700
700
#00679B
oklch(49.1% 0.115 241)
-
Step 800
800
#005480
oklch(42.6% 0.1 241.3)
-
Step 900
900
#0E4667
oklch(37.7% 0.079 240.5)
-
Step 950
950
#0B293D
oklch(27% 0.051 241.6)
#63A4D2 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) | #90A4D4 | 0.051 |
| Deuteranopia (no green cones) | #8198D1 | 0.043 |
| Tritanopia (no blue cones) | #1EAFB3 | 0.078 |
| Achromatopsia (no color) | #9D9D9D | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63A4D2
#63A4D2
oklch(69.3% 0.095 240.8)
- #C88E5D
#C88E5D
oklch(69.3% 0.096 60.4)
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 #63A4D2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.044
- Bluegrey #85A3B2 ΔE 0.057
- Bluey Grey #89A0B0 ΔE 0.060
- Turquoise Blue #06B1C4 ΔE 0.064
- Cornflower Blue #6495ED ΔE 0.065
- Cool Gray #8D99AE ΔE 0.066
- Faded Blue #658CBB ΔE 0.067
- Chefchaouen Blue #4895EF ΔE 0.072
Use #63A4D2 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.