#63A3BF
Closest named color: Greyblue (#77A1B5). oklch(68.3% 0.078 227.9), rgb(99, 163, 191).
Aa
Black text reads best on this color (7.52:1).
About this color
#63A3BF is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 68%, its chroma 0.078 and its hue 228°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.023 away. Black text reads best on it, at 7.52:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.52:1 |
| White text | 2.79:1 |
Values
| HEX | #63A3BF |
| RGB | rgb(99, 163, 191) |
| HSL | hsl(198, 42%, 57%) |
| OKLCH | oklch(68.3% 0.078 227.9) |
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 #63A3BF | 2.79:1 | Fails | Lc -58.9 | Large or bold text, headings |
| Black text on #63A3BF | 7.52:1 | AAA | Lc 50.4 | Large or bold text, headings |
| #63A3BF text on white | 2.79:1 | Fails | Lc 53.7 | Large or bold text, headings |
| #63A3BF text on black | 7.52:1 | AAA | Lc -48.2 | 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
#C8DDE7
oklch(88.5% 0.026 227.9)
-
Step 300
300
#A1C7D9
oklch(80.8% 0.048 228.3)
-
Step 400
400 (this color)
#63A3BF
oklch(68.3% 0.078 227.9)
-
Step 500
500
#3C95B8
oklch(63.1% 0.099 227.6)
-
Step 600
600
#037FA4
oklch(55.7% 0.107 227.3)
-
Step 700
700
#006A8B
oklch(49% 0.096 228.3)
-
Step 800
800
#015772
oklch(42.6% 0.083 227.7)
-
Step 900
900
#12485C
oklch(37.7% 0.064 227.4)
-
Step 950
950
#0D2A36
oklch(26.9% 0.041 228.4)
#63A3BF 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) | #94A0C0 | 0.057 |
| Deuteranopia (no green cones) | #8796BF | 0.052 |
| Tritanopia (no blue cones) | #35ABAC | 0.055 |
| Achromatopsia (no color) | #9B9B9B | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63A3BF
#63A3BF
oklch(68.3% 0.078 227.9)
- #C18B6F
#C18B6F
oklch(68.3% 0.077 48.4)
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 #63A3BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.023
- Bluegrey #85A3B2 ΔE 0.041
- Bluey Grey #89A0B0 ΔE 0.045
- Cadet Blue #5F9EA0 ΔE 0.046
- Cool Gray #8D99AE ΔE 0.053
- Turquoise Blue #06B1C4 ΔE 0.054
- Silver Lake Blue #778DA9 ΔE 0.062
- Blue Grey #758DA3 ΔE 0.064
Use #63A3BF 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.