#63B591
Closest named color: Greeny Blue (#42B395). oklch(71.1% 0.097 163.7), rgb(99, 181, 145).
Aa
Black text reads best on this color (8.54:1).
About this color
#63B591 is a medium-light, moderately saturated green. In OKLCH its lightness is 71%, its chroma 0.097 and its hue 164°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Greeny Blue (#42B395), ΔE 0.027 away. Black text reads best on it, at 8.54:1.
| Hue family | Greens |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.097) |
| Temperature | in between |
| Nearest name | Greeny Blue (#42B395) |
| Black text | 8.54:1 |
| White text | 2.45:1 |
Values
| HEX | #63B591 |
| RGB | rgb(99, 181, 145) |
| HSL | hsl(154, 36%, 55%) |
| OKLCH | oklch(71.1% 0.097 163.7) |
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 #63B591 | 2.45:1 | Fails | Lc -53.2 | Large or bold text, headings |
| Black text on #63B591 | 8.54:1 | AAA | Lc 55.8 | Large or bold text, headings |
| #63B591 text on white | 2.45:1 | Fails | Lc 48.2 | Large or bold text, headings |
| #63B591 text on black | 8.54:1 | AAA | Lc -53.8 | 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
#F1F7F4
oklch(97.1% 0.007 164.9)
-
Step 100
100
#E0EEE7
oklch(93.7% 0.018 164.6)
-
Step 200
200
#C6E1D3
oklch(88.6% 0.034 163.2)
-
Step 300
300
#9DCEB6
oklch(81% 0.061 163.5)
-
Step 400
400 (this color)
#63B591
oklch(71.1% 0.097 163.7)
-
Step 500
500
#25A074
oklch(62.9% 0.124 163.7)
-
Step 600
600
#008860
oklch(55.5% 0.118 164)
-
Step 700
700
#007350
oklch(49.2% 0.105 163.6)
-
Step 800
800
#005E41
oklch(42.7% 0.091 163.9)
-
Step 900
900
#004F35
oklch(37.8% 0.082 162.9)
-
Step 950
950
#072E1F
oklch(27% 0.051 163.2)
#63B591 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) | #B2AB8F | 0.095 |
| Deuteranopia (no green cones) | #A6A293 | 0.092 |
| Tritanopia (no blue cones) | #4BB5AB | 0.039 |
| Achromatopsia (no color) | #A5A5A5 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63B591
#63B591
oklch(71.1% 0.097 163.7)
- #CD89B1
#CD89B1
oklch(71.1% 0.097 343.7)
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 #63B591, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greeny Blue #42B395 ΔE 0.027
- Tea #65AB7C ΔE 0.034
- Faded Green #7BB274 ΔE 0.039
- Dusty Green #76A973 ΔE 0.043
- Sage Green #88B378 ΔE 0.045
- Sage #87AE73 ΔE 0.047
- Muted Teal #90B494 ΔE 0.049
- Topaz #13BBAF ΔE 0.050
Use #63B591 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.