#63B399
Closest named color: Greeny Blue (#42B395). oklch(70.8% 0.089 170.6), rgb(99, 179, 153).
Aa
Black text reads best on this color (8.43:1).
About this color
#63B399 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 71%, its chroma 0.089 and its hue 171°. Its hue sits on the cool side of the wheel. The nearest named color is Greeny Blue (#42B395), ΔE 0.027 away. Black text reads best on it, at 8.43:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Greeny Blue (#42B395) |
| Black text | 8.43:1 |
| White text | 2.48:1 |
Values
| HEX | #63B399 |
| RGB | rgb(99, 179, 153) |
| HSL | hsl(161, 34%, 55%) |
| OKLCH | oklch(70.8% 0.089 170.6) |
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 #63B399 | 2.48:1 | Fails | Lc -53.8 | Large or bold text, headings |
| Black text on #63B399 | 8.43:1 | AAA | Lc 55.3 | Large or bold text, headings |
| #63B399 text on white | 2.48:1 | Fails | Lc 48.7 | Large or bold text, headings |
| #63B399 text on black | 8.43:1 | AAA | Lc -53.2 | 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
#F1F7F5
oklch(97.1% 0.007 174.4)
-
Step 100
100
#E0EEE8
oklch(93.7% 0.017 168.5)
-
Step 200
200
#C6E0D6
oklch(88.5% 0.031 170.5)
-
Step 300
300
#9DCDBB
oklch(80.9% 0.056 169.9)
-
Step 400
400 (this color)
#63B399
oklch(70.8% 0.089 170.6)
-
Step 500
500
#289F80
oklch(63.1% 0.113 170.9)
-
Step 600
600
#00876A
oklch(55.5% 0.109 170.8)
-
Step 700
700
#007259
oklch(49.1% 0.097 170.7)
-
Step 800
800
#005D48
oklch(42.6% 0.084 170.6)
-
Step 900
900
#014E3C
oklch(37.7% 0.074 170.6)
-
Step 950
950
#072E23
oklch(27.1% 0.048 170)
#63B399 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) | #AFAA98 | 0.091 |
| Deuteranopia (no green cones) | #A2A09B | 0.088 |
| Tritanopia (no blue cones) | #48B4AB | 0.030 |
| Achromatopsia (no color) | #A4A4A4 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63B399
#63B399
oklch(70.8% 0.089 170.6)
- #CC8AA8
#CC8AA8
oklch(70.8% 0.089 350.8)
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 #63B399, 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 0.040
- Light Sea Green #20B2AA ΔE 0.044
- Topaz #13BBAF ΔE 0.045
- Muted Teal #90B494 ΔE 0.048
- Dusty Green #76A973 ΔE 0.050
- Faded Green #7BB274 ΔE 0.051
- Sage Green #88B378 ΔE 0.054
Use #63B399 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.