#63BF9E
Closest named color: Medium Aquamarine (#66CDAA). oklch(73.8% 0.101 167.9), rgb(99, 191, 158).
Aa
Black text reads best on this color (9.47:1).
About this color
#63BF9E is a medium-light, moderately saturated green. In OKLCH its lightness is 74%, its chroma 0.101 and its hue 168°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Medium Aquamarine (#66CDAA), ΔE 0.039 away. Black text reads best on it, at 9.47:1.
| Hue family | Greens |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.101) |
| Temperature | in between |
| Nearest name | Medium Aquamarine (#66CDAA) |
| Black text | 9.47:1 |
| White text | 2.21:1 |
Values
| HEX | #63BF9E |
| RGB | rgb(99, 191, 158) |
| HSL | hsl(158, 42%, 57%) |
| OKLCH | oklch(73.8% 0.101 167.9) |
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 #63BF9E | 2.21:1 | Fails | Lc -48.2 | Large or bold text, headings |
| Black text on #63BF9E | 9.47:1 | AAA | Lc 60.5 | Content text, not long reading |
| #63BF9E text on white | 2.21:1 | Fails | Lc 43.5 | Non-text elements, placeholder text |
| #63BF9E text on black | 9.47:1 | AAA | Lc -58.7 | 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
#C4E1D5
oklch(88.5% 0.035 168.7)
-
Step 300
300
#99CEB9
oklch(80.9% 0.063 168.4)
-
Step 400
400 (this color)
#63BF9E
oklch(73.8% 0.101 167.9)
-
Step 500
500
#00A17A
oklch(63% 0.128 168)
-
Step 600
600
#008866
oklch(55.6% 0.113 167.6)
-
Step 700
700
#007256
oklch(49% 0.099 168.4)
-
Step 800
800
#005E46
oklch(42.8% 0.087 168)
-
Step 900
900
#004E3A
oklch(37.7% 0.076 168.5)
-
Step 950
950
#012F21
oklch(27.1% 0.055 167)
#63BF9E 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) | #BBB49C | 0.103 |
| Deuteranopia (no green cones) | #ADAAA0 | 0.099 |
| Tritanopia (no blue cones) | #43C0B5 | 0.036 |
| Achromatopsia (no color) | #AEAEAE | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63BF9E
#63BF9E
oklch(73.8% 0.101 167.9)
- #DA90B6
#DA90B6
oklch(73.9% 0.101 347.7)
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 #63BF9E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Aquamarine #66CDAA ΔE 0.039
- Dark Sea Green #8FBC8F ΔE 0.044
- Greeny Blue #42B395 ΔE 0.046
- Topaz #13BBAF ΔE 0.048
- Muted Teal #90B494 ΔE 0.050
- Greenblue #23C48B ΔE 0.052
- Pale Teal #82CBB2 ΔE 0.052
- Green Blue #01C08D ΔE 0.053
Use #63BF9E 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.