#63AED4
Closest named color: Greyblue (#77A1B5). oklch(71.7% 0.093 232.1), rgb(99, 174, 212).
Aa
Black text reads best on this color (8.53:1).
About this color
#63AED4 is a medium-light, moderately saturated blue. In OKLCH its lightness is 72%, its chroma 0.093 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.050 away. Black text reads best on it, at 8.53:1.
| Hue family | Blues |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 8.53:1 |
| White text | 2.46:1 |
Values
| HEX | #63AED4 |
| RGB | rgb(99, 174, 212) |
| HSL | hsl(200, 57%, 61%) |
| OKLCH | oklch(71.7% 0.093 232.1) |
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 #63AED4 | 2.46:1 | Fails | Lc -53.2 | Large or bold text, headings |
| Black text on #63AED4 | 8.53:1 | AAA | Lc 55.8 | Large or bold text, headings |
| #63AED4 text on white | 2.46:1 | Fails | Lc 48.2 | Large or bold text, headings |
| #63AED4 text on black | 8.53:1 | AAA | Lc -53.8 | 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
#DFECF3
oklch(93.5% 0.017 230.9)
-
Step 200
200
#C5DDEB
oklch(88.4% 0.032 233.3)
-
Step 300
300
#9BC8E0
oklch(80.9% 0.058 231.7)
-
Step 400
400 (this color)
#63AED4
oklch(71.7% 0.093 232.1)
-
Step 500
500
#2495C5
oklch(63.1% 0.119 232.3)
-
Step 600
600
#007EAA
oklch(55.7% 0.113 231.8)
-
Step 700
700
#006A90
oklch(49.2% 0.1 232)
-
Step 800
800
#005676
oklch(42.6% 0.087 232.3)
-
Step 900
900
#004863
oklch(37.7% 0.077 231.8)
-
Step 950
950
#062A3A
oklch(26.9% 0.049 232.2)
#63AED4 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) | #9BACD6 | 0.062 |
| Deuteranopia (no green cones) | #8BA0D3 | 0.054 |
| Tritanopia (no blue cones) | #13B8BA | 0.070 |
| Achromatopsia (no color) | #A5A5A5 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63AED4
#63AED4
oklch(71.7% 0.093 232.1)
- #D2936D
#D2936D
oklch(71.6% 0.092 51.8)
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 #63AED4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.050
- Turquoise Blue #06B1C4 ΔE 0.055
- Bluegrey #85A3B2 ΔE 0.056
- Bluey Grey #89A0B0 ΔE 0.063
- Cool Steel #97A7B3 ΔE 0.068
- Deep Sky Blue #00BFFF ΔE 0.072
- Vivid Sky Blue #4CC9F0 ΔE 0.074
- Cool Gray #8D99AE ΔE 0.075
Use #63AED4 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.