#51AC8A
Closest named color: Greeny Blue (#42B395). oklch(67.9% 0.102 166.4), rgb(81, 172, 138).
Aa
Black text reads best on this color (7.61:1).
About this color
#51AC8A is a medium-light, moderately saturated green. In OKLCH its lightness is 68%, its chroma 0.102 and its hue 166°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Greeny Blue (#42B395), ΔE 0.021 away. Black text reads best on it, at 7.61:1.
| Hue family | Greens |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.102) |
| Temperature | in between |
| Nearest name | Greeny Blue (#42B395) |
| Black text | 7.61:1 |
| White text | 2.75:1 |
Values
| HEX | #51AC8A |
| RGB | rgb(81, 172, 138) |
| HSL | hsl(158, 36%, 50%) |
| OKLCH | oklch(67.9% 0.102 166.4) |
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 #51AC8A | 2.75:1 | Fails | Lc -58.3 | Large or bold text, headings |
| Black text on #51AC8A | 7.61:1 | AAA | Lc 51.0 | Large or bold text, headings |
| #51AC8A text on white | 2.75:1 | Fails | Lc 53.0 | Large or bold text, headings |
| #51AC8A text on black | 7.61:1 | AAA | Lc -48.8 | 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
#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
#9ACEB8
oklch(80.9% 0.062 166.9)
-
Step 400
400 (this color)
#51AC8A
oklch(67.9% 0.102 166.4)
-
Step 500
500
#01A278
oklch(63.2% 0.13 166.5)
-
Step 600
600
#008864
oklch(55.6% 0.115 166.4)
-
Step 700
700
#007254
oklch(49% 0.101 166.9)
-
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
#022F20
oklch(27.1% 0.055 165.2)
#51AC8A 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) | #A9A288 | 0.102 |
| Deuteranopia (no green cones) | #9B988C | 0.098 |
| Tritanopia (no blue cones) | #2DACA2 | 0.038 |
| Achromatopsia (no color) | #9C9C9C | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51AC8A
#51AC8A
oklch(67.9% 0.102 166.4)
- #C67EA5
#C67EA5
oklch(68% 0.102 346.5)
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 #51AC8A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greeny Blue #42B395 ΔE 0.021
- Tea #65AB7C ΔE 0.023
- Dark Seafoam Green #3EAF76 ΔE 0.036
- Bluey Green #2BB179 ΔE 0.041
- Dusty Green #76A973 ΔE 0.041
- Dull Teal #5F9E8F ΔE 0.045
- Light Sea Green #20B2AA ΔE 0.046
- Algae #54AC68 ΔE 0.046
Use #51AC8A 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.