#51AA8A
Closest named color: Tea (#65AB7C). oklch(67.4% 0.099 167.4), rgb(81, 170, 138).
Aa
Black text reads best on this color (7.46:1).
About this color
#51AA8A is a medium-light, moderately saturated green. In OKLCH its lightness is 67%, its chroma 0.099 and its hue 167°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Tea (#65AB7C), ΔE 0.025 away. Black text reads best on it, at 7.46:1.
| Hue family | Greens |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.099) |
| Temperature | in between |
| Nearest name | Tea (#65AB7C) |
| Black text | 7.46:1 |
| White text | 2.81:1 |
Values
| HEX | #51AA8A |
| RGB | rgb(81, 170, 138) |
| HSL | hsl(158, 35%, 49%) |
| OKLCH | oklch(67.4% 0.099 167.4) |
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 #51AA8A | 2.81:1 | Fails | Lc -59.1 | Large or bold text, headings |
| Black text on #51AA8A | 7.46:1 | AAA | Lc 50.2 | Large or bold text, headings |
| #51AA8A text on white | 2.81:1 | Fails | Lc 53.9 | Large or bold text, headings |
| #51AA8A text on black | 7.46:1 | AAA | Lc -48.0 | 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
#C5E1D4
oklch(88.6% 0.035 165.9)
-
Step 300
300
#9ACEB8
oklch(80.9% 0.062 166.9)
-
Step 400
400 (this color)
#51AA8A
oklch(67.4% 0.099 167.4)
-
Step 500
500
#0DA17A
oklch(63.1% 0.126 167.7)
-
Step 600
600
#008866
oklch(55.6% 0.113 167.6)
-
Step 700
700
#007255
oklch(49% 0.1 167.6)
-
Step 800
800
#005E45
oklch(42.8% 0.088 167.1)
-
Step 900
900
#004E39
oklch(37.6% 0.077 167.4)
-
Step 950
950
#032E21
oklch(26.9% 0.052 167.7)
#51AA8A 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) | #A6A088 | 0.099 |
| Deuteranopia (no green cones) | #99968C | 0.096 |
| Tritanopia (no blue cones) | #2EABA1 | 0.036 |
| Achromatopsia (no color) | #9A9A9A | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51AA8A
#51AA8A
oklch(67.4% 0.099 167.4)
- #C37DA2
#C37DA2
oklch(67.4% 0.099 347.1)
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 #51AA8A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Tea #65AB7C ΔE 0.025
- Greeny Blue #42B395 ΔE 0.026
- Dark Seafoam Green #3EAF76 ΔE 0.039
- Dull Teal #5F9E8F ΔE 0.039
- Dusty Green #76A973 ΔE 0.042
- Bluey Green #2BB179 ΔE 0.044
- Grey Teal #5E9B8A ΔE 0.045
- Light Sea Green #20B2AA ΔE 0.046
Use #51AA8A 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.