#63AEB9
Closest named color: Greyblue (#77A1B5). oklch(70.6% 0.076 207.7), rgb(99, 174, 185).
Aa
Black text reads best on this color (8.28:1).
About this color
#63AEB9 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 71%, its chroma 0.076 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.038 away. Black text reads best on it, at 8.28:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 8.28:1 |
| White text | 2.53:1 |
Values
| HEX | #63AEB9 |
| RGB | rgb(99, 174, 185) |
| HSL | hsl(188, 38%, 56%) |
| OKLCH | oklch(70.6% 0.076 207.7) |
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 #63AEB9 | 2.53:1 | Fails | Lc -54.6 | Large or bold text, headings |
| Black text on #63AEB9 | 8.28:1 | AAA | Lc 54.5 | Large or bold text, headings |
| #63AEB9 text on white | 2.53:1 | Fails | Lc 49.5 | Large or bold text, headings |
| #63AEB9 text on black | 8.28:1 | AAA | Lc -52.4 | 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
#F1F7F8
oklch(97.2% 0.007 208.8)
-
Step 100
100
#E0EDEF
oklch(93.7% 0.014 207.9)
-
Step 200
200
#C6DEE2
oklch(88.4% 0.026 208.7)
-
Step 300
300
#9DCAD1
oklch(80.9% 0.048 208)
-
Step 400
400 (this color)
#63AEB9
oklch(70.6% 0.076 207.7)
-
Step 500
500
#2B9AA8
oklch(63.2% 0.097 207.5)
-
Step 600
600
#008290
oklch(55.5% 0.095 208)
-
Step 700
700
#006E79
oklch(49.2% 0.084 206.9)
-
Step 800
800
#005A64
oklch(42.8% 0.073 207.9)
-
Step 900
900
#034B53
oklch(37.8% 0.064 207.3)
-
Step 950
950
#082C31
oklch(27.1% 0.04 208.4)
#63AEB9 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) | #A3A9BA | 0.074 |
| Deuteranopia (no green cones) | #959EB9 | 0.068 |
| Tritanopia (no blue cones) | #36B4B1 | 0.039 |
| Achromatopsia (no color) | #A3A3A3 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63AEB9
#63AEB9
oklch(70.6% 0.076 207.7)
- #CC8E86
#CC8E86
oklch(70.6% 0.077 27.4)
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 #63AEB9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.038
- Bluegrey #85A3B2 ΔE 0.043
- Turquoise Blue #06B1C4 ΔE 0.044
- Light Sea Green #20B2AA ΔE 0.051
- Bluey Grey #89A0B0 ΔE 0.051
- Cadet Blue #5F9EA0 ΔE 0.051
- Cool Steel #97A7B3 ΔE 0.058
- Topaz #13BBAF ΔE 0.059
Use #63AEB9 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.