#63A7CF
Closest named color: Greyblue (#77A1B5). oklch(69.9% 0.091 235.9), rgb(99, 167, 207).
Aa
Black text reads best on this color (7.95:1).
About this color
#63A7CF is a medium-light, moderately saturated blue. In OKLCH its lightness is 70%, its chroma 0.091 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.040 away. Black text reads best on it, at 7.95:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.95:1 |
| White text | 2.63:1 |
Values
| HEX | #63A7CF |
| RGB | rgb(99, 167, 207) |
| HSL | hsl(202, 53%, 60%) |
| OKLCH | oklch(69.9% 0.091 235.9) |
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 #63A7CF | 2.63:1 | Fails | Lc -56.4 | Large or bold text, headings |
| Black text on #63A7CF | 7.95:1 | AAA | Lc 52.8 | Large or bold text, headings |
| #63A7CF text on white | 2.63:1 | Fails | Lc 51.3 | Large or bold text, headings |
| #63A7CF text on black | 7.95:1 | AAA | Lc -50.6 | 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
#E0ECF4
oklch(93.6% 0.017 236.7)
-
Step 200
200
#C6DDEB
oklch(88.5% 0.031 234.5)
-
Step 300
300
#9EC7E1
oklch(80.9% 0.057 236.2)
-
Step 400
400 (this color)
#63A7CF
oklch(69.9% 0.091 235.9)
-
Step 500
500
#3293C6
oklch(63% 0.117 236.2)
-
Step 600
600
#007DAF
oklch(55.7% 0.119 235.4)
-
Step 700
700
#006994
oklch(49.2% 0.105 235.5)
-
Step 800
800
#00567A
oklch(42.8% 0.091 235.4)
-
Step 900
900
#0A4764
oklch(37.7% 0.076 235.8)
-
Step 950
950
#0A2A3B
oklch(27.1% 0.048 236)
#63A7CF 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) | #94A6D1 | 0.056 |
| Deuteranopia (no green cones) | #859ACE | 0.048 |
| Tritanopia (no blue cones) | #21B1B4 | 0.071 |
| Achromatopsia (no color) | #9F9F9F | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63A7CF
#63A7CF
oklch(69.9% 0.091 235.9)
- #CA8F66
#CA8F66
oklch(69.9% 0.091 55.4)
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 #63A7CF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.040
- Bluegrey #85A3B2 ΔE 0.051
- Bluey Grey #89A0B0 ΔE 0.056
- Turquoise Blue #06B1C4 ΔE 0.057
- Cool Gray #8D99AE ΔE 0.065
- Cool Steel #97A7B3 ΔE 0.069
- Cadet Blue #5F9EA0 ΔE 0.069
- Faded Blue #658CBB ΔE 0.074
Use #63A7CF 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.