#63AFD7
Closest named color: Greyblue (#77A1B5). oklch(72% 0.095 233.2), rgb(99, 175, 215).
Aa
Black text reads best on this color (8.64:1).
About this color
#63AFD7 is a medium-light, moderately saturated blue. In OKLCH its lightness is 72%, its chroma 0.095 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.054 away. Black text reads best on it, at 8.64:1.
| Hue family | Blues |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 8.64:1 |
| White text | 2.42:1 |
Values
| HEX | #63AFD7 |
| RGB | rgb(99, 175, 215) |
| HSL | hsl(201, 59%, 62%) |
| OKLCH | oklch(72% 0.095 233.2) |
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 #63AFD7 | 2.42:1 | Fails | Lc -52.7 | Large or bold text, headings |
| Black text on #63AFD7 | 8.64:1 | AAA | Lc 56.3 | Large or bold text, headings |
| #63AFD7 text on white | 2.42:1 | Fails | Lc 47.7 | Large or bold text, headings |
| #63AFD7 text on black | 8.64:1 | AAA | Lc -54.4 | 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
#F0F6FA
oklch(97% 0.008 236.6)
-
Step 100
100
#DFECF4
oklch(93.6% 0.018 234.5)
-
Step 200
200
#C5DDEC
oklch(88.4% 0.033 235.2)
-
Step 300
300
#9BC8E1
oklch(80.9% 0.059 232.8)
-
Step 400
400 (this color)
#63AFD7
oklch(72% 0.095 233.2)
-
Step 500
500
#2195C7
oklch(63.2% 0.122 233.1)
-
Step 600
600
#007DAB
oklch(55.5% 0.115 233.2)
-
Step 700
700
#006991
oklch(49% 0.102 233.6)
-
Step 800
800
#005677
oklch(42.6% 0.088 233.1)
-
Step 900
900
#004864
oklch(37.8% 0.078 232.8)
-
Step 950
950
#062A3B
oklch(26.9% 0.05 233.9)
#63AFD7 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) | #9CADD9 | 0.063 |
| Deuteranopia (no green cones) | #8BA1D6 | 0.054 |
| Tritanopia (no blue cones) | #07BABC | 0.073 |
| Achromatopsia (no color) | #A6A6A6 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63AFD7
#63AFD7
oklch(72% 0.095 233.2)
- #D4946B
#D4946B
oklch(72% 0.095 53.3)
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 #63AFD7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.054
- Turquoise Blue #06B1C4 ΔE 0.057
- Bluegrey #85A3B2 ΔE 0.060
- Bluey Grey #89A0B0 ΔE 0.066
- Deep Sky Blue #00BFFF ΔE 0.068
- Vivid Sky Blue #4CC9F0 ΔE 0.070
- Cool Steel #97A7B3 ΔE 0.071
- Carolina Blue #8AB8FE ΔE 0.075
Use #63AFD7 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.