#63BF9B
Closest named color: Medium Aquamarine (#66CDAA). oklch(73.8% 0.104 166), rgb(99, 191, 155).
Aa
Black text reads best on this color (9.45:1).
About this color
#63BF9B is a medium-light, moderately saturated green. In OKLCH its lightness is 74%, its chroma 0.104 and its hue 166°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Medium Aquamarine (#66CDAA), ΔE 0.040 away. Black text reads best on it, at 9.45:1.
| Hue family | Greens |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.104) |
| Temperature | in between |
| Nearest name | Medium Aquamarine (#66CDAA) |
| Black text | 9.45:1 |
| White text | 2.22:1 |
Values
| HEX | #63BF9B |
| RGB | rgb(99, 191, 155) |
| HSL | hsl(157, 42%, 57%) |
| OKLCH | oklch(73.8% 0.104 166) |
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 #63BF9B | 2.22:1 | Fails | Lc -48.3 | Large or bold text, headings |
| Black text on #63BF9B | 9.45:1 | AAA | Lc 60.4 | Content text, not long reading |
| #63BF9B text on white | 2.22:1 | Fails | Lc 43.6 | Non-text elements, placeholder text |
| #63BF9B text on black | 9.45:1 | AAA | Lc -58.6 | 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
#F0F7F4
oklch(97% 0.008 168.8)
-
Step 100
100
#DFEEE7
oklch(93.6% 0.018 166.4)
-
Step 200
200
#C4E1D4
oklch(88.5% 0.035 166.8)
-
Step 300
300
#99CEB7
oklch(80.8% 0.064 166.2)
-
Step 400
400 (this color)
#63BF9B
oklch(73.8% 0.104 166)
-
Step 500
500
#00A277
oklch(63.2% 0.131 166)
-
Step 600
600
#008863
oklch(55.6% 0.116 165.8)
-
Step 700
700
#007253
oklch(49% 0.101 166.2)
-
Step 800
800
#005E44
oklch(42.7% 0.088 166.3)
-
Step 900
900
#004E38
oklch(37.6% 0.078 166.4)
-
Step 950
950
#012F20
oklch(27.1% 0.056 165.5)
#63BF9B 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) | #BCB499 | 0.104 |
| Deuteranopia (no green cones) | #ADAA9D | 0.099 |
| Tritanopia (no blue cones) | #44BFB5 | 0.040 |
| Achromatopsia (no color) | #AEAEAE | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63BF9B
#63BF9B
oklch(73.8% 0.104 166)
- #DA8FB8
#DA8FB8
oklch(73.8% 0.104 346)
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 #63BF9B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Aquamarine #66CDAA ΔE 0.040
- Dark Sea Green #8FBC8F ΔE 0.043
- Greeny Blue #42B395 ΔE 0.045
- Greenblue #23C48B ΔE 0.049
- Muted Teal #90B494 ΔE 0.050
- Green Blue #01C08D ΔE 0.050
- Topaz #13BBAF ΔE 0.050
- Soft Green #6FC276 ΔE 0.052
Use #63BF9B 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.