#51BB8F
Closest named color: Greeny Blue (#42B395). oklch(71.8% 0.118 163.4), rgb(81, 187, 143).
Aa
Black text reads best on this color (8.85:1).
About this color
#51BB8F is a medium-light, moderately saturated green. In OKLCH its lightness is 72%, its chroma 0.118 and its hue 163°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Greeny Blue (#42B395), ΔE 0.030 away. Black text reads best on it, at 8.85:1.
| Hue family | Greens |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.118) |
| Temperature | in between |
| Nearest name | Greeny Blue (#42B395) |
| Black text | 8.85:1 |
| White text | 2.37:1 |
Values
| HEX | #51BB8F |
| RGB | rgb(81, 187, 143) |
| HSL | hsl(155, 44%, 53%) |
| OKLCH | oklch(71.8% 0.118 163.4) |
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 #51BB8F | 2.37:1 | Fails | Lc -51.4 | Large or bold text, headings |
| Black text on #51BB8F | 8.85:1 | AAA | Lc 57.5 | Large or bold text, headings |
| #51BB8F text on white | 2.37:1 | Fails | Lc 46.5 | Large or bold text, headings |
| #51BB8F text on black | 8.85:1 | AAA | Lc -55.6 | 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
#F0F8F3
oklch(97.2% 0.011 158.8)
-
Step 100
100
#DEEFE6
oklch(93.7% 0.022 163)
-
Step 200
200
#C2E2D2
oklch(88.5% 0.04 163.9)
-
Step 300
300
#94D0B3
oklch(80.8% 0.074 163.3)
-
Step 400
400 (this color)
#51BB8F
oklch(71.8% 0.118 163.4)
-
Step 500
500
#00A272
oklch(63% 0.135 163.5)
-
Step 600
600
#00885F
oklch(55.5% 0.119 163.5)
-
Step 700
700
#00734F
oklch(49.1% 0.106 163)
-
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
#002F1E
oklch(27% 0.058 163)
#51BB8F 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) | #B8AF8D | 0.116 |
| Deuteranopia (no green cones) | #A9A492 | 0.112 |
| Tritanopia (no blue cones) | #22BBAF | 0.048 |
| Achromatopsia (no color) | #A8A8A8 | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51BB8F
#51BB8F
oklch(71.8% 0.118 163.4)
- #D785B7
#D785B7
oklch(71.8% 0.118 343.2)
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 #51BB8F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greeny Blue #42B395 ΔE 0.030
- Green Blue #01C08D ΔE 0.031
- Greenblue #23C48B ΔE 0.034
- Dark Seafoam #1FB57A ΔE 0.044
- Tea #65AB7C ΔE 0.044
- Faded Green #7BB274 ΔE 0.045
- Medium Sea Green #3CB371 ΔE 0.046
- Dark Mint #48C072 ΔE 0.046
Use #51BB8F 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.