#63A0BF
Closest named color: Greyblue (#77A1B5). oklch(67.6% 0.078 231.7), rgb(99, 160, 191).
Aa
Black text reads best on this color (7.31:1).
About this color
#63A0BF is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.078 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.026 away. Black text reads best on it, at 7.31:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.31:1 |
| White text | 2.87:1 |
Values
| HEX | #63A0BF |
| RGB | rgb(99, 160, 191) |
| HSL | hsl(200, 42%, 57%) |
| OKLCH | oklch(67.6% 0.078 231.7) |
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 #63A0BF | 2.87:1 | Fails | Lc -60.1 | Content text, not long reading |
| Black text on #63A0BF | 7.31:1 | AAA | Lc 49.2 | Large or bold text, headings |
| #63A0BF text on white | 2.87:1 | Fails | Lc 54.8 | Large or bold text, headings |
| #63A0BF text on black | 7.31:1 | AAA | Lc -47.0 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C8DDE8
oklch(88.5% 0.027 230.4)
-
Step 300
300
#A2C7DB
oklch(80.9% 0.049 231.7)
-
Step 400
400 (this color)
#63A0BF
oklch(67.6% 0.078 231.7)
-
Step 500
500
#4094BB
oklch(63.1% 0.099 231.5)
-
Step 600
600
#127DA7
oklch(55.5% 0.108 231.9)
-
Step 700
700
#006A8F
oklch(49.2% 0.1 231.3)
-
Step 800
800
#095674
oklch(42.6% 0.083 231.7)
-
Step 900
900
#15475E
oklch(37.6% 0.065 232.4)
-
Step 950
950
#0E2A37
oklch(27% 0.041 231.2)
#63A0BF 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) | #919EC1 | 0.054 |
| Deuteranopia (no green cones) | #8494BF | 0.048 |
| Tritanopia (no blue cones) | #36A9AA | 0.059 |
| Achromatopsia (no color) | #989898 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63A0BF
#63A0BF
oklch(67.6% 0.078 231.7)
- #BE8A6A
#BE8A6A
oklch(67.7% 0.078 52.6)
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 #63A0BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.026
- Bluegrey #85A3B2 ΔE 0.044
- Cadet Blue #5F9EA0 ΔE 0.047
- Bluey Grey #89A0B0 ΔE 0.047
- Cool Gray #8D99AE ΔE 0.052
- Silver Lake Blue #778DA9 ΔE 0.055
- Faded Blue #658CBB ΔE 0.056
- Blue Grey #758DA3 ΔE 0.058
Use #63A0BF 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.