#63A3BC
Closest named color: Greyblue (#77A1B5). oklch(68.2% 0.075 225), rgb(99, 163, 188).
Aa
Black text reads best on this color (7.49:1).
About this color
#63A3BC is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 68%, its chroma 0.075 and its hue 225°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.022 away. Black text reads best on it, at 7.49:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.49:1 |
| White text | 2.80:1 |
Values
| HEX | #63A3BC |
| RGB | rgb(99, 163, 188) |
| HSL | hsl(197, 40%, 56%) |
| OKLCH | oklch(68.2% 0.075 225) |
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 #63A3BC | 2.80:1 | Fails | Lc -59.1 | Large or bold text, headings |
| Black text on #63A3BC | 7.49:1 | AAA | Lc 50.2 | Large or bold text, headings |
| #63A3BC text on white | 2.80:1 | Fails | Lc 53.8 | Large or bold text, headings |
| #63A3BC text on black | 7.49:1 | AAA | Lc -48.0 | 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
#E1ECF1
oklch(93.6% 0.014 226.6)
-
Step 200
200
#C8DDE6
oklch(88.5% 0.026 225.3)
-
Step 300
300
#A1C8D8
oklch(81% 0.047 224.8)
-
Step 400
400 (this color)
#63A3BC
oklch(68.2% 0.075 225)
-
Step 500
500
#3C95B5
oklch(63% 0.096 225.3)
-
Step 600
600
#047FA1
oklch(55.5% 0.105 225.2)
-
Step 700
700
#006B88
oklch(49.1% 0.093 224.9)
-
Step 800
800
#015870
oklch(42.8% 0.08 224.5)
-
Step 900
900
#12485B
oklch(37.6% 0.063 226.1)
-
Step 950
950
#0D2A35
oklch(26.9% 0.04 226.2)
#63A3BC 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) | #95A0BD | 0.059 |
| Deuteranopia (no green cones) | #8896BC | 0.053 |
| Tritanopia (no blue cones) | #37ABAB | 0.052 |
| Achromatopsia (no color) | #9A9A9A | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63A3BC
#63A3BC
oklch(68.2% 0.075 225)
- #C18A72
#C18A72
oklch(68.2% 0.076 44.5)
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 #63A3BC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.022
- Bluegrey #85A3B2 ΔE 0.039
- Cadet Blue #5F9EA0 ΔE 0.042
- Bluey Grey #89A0B0 ΔE 0.044
- Cool Gray #8D99AE ΔE 0.052
- Turquoise Blue #06B1C4 ΔE 0.054
- Silver Lake Blue #778DA9 ΔE 0.061
- Blue Grey #758DA3 ΔE 0.062
Use #63A3BC 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.