#51A993
Closest named color: Greeny Blue (#42B395). oklch(67.4% 0.092 174.8), rgb(81, 169, 147).
Aa
Black text reads best on this color (7.44:1).
About this color
#51A993 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 67%, its chroma 0.092 and its hue 175°. Its hue sits on the cool side of the wheel. The nearest named color is Greeny Blue (#42B395), ΔE 0.029 away. Black text reads best on it, at 7.44:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Greeny Blue (#42B395) |
| Black text | 7.44:1 |
| White text | 2.82:1 |
Values
| HEX | #51A993 |
| RGB | rgb(81, 169, 147) |
| HSL | hsl(165, 35%, 49%) |
| OKLCH | oklch(67.4% 0.092 174.8) |
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 #51A993 | 2.82:1 | Fails | Lc -59.3 | Large or bold text, headings |
| Black text on #51A993 | 7.44:1 | AAA | Lc 50.0 | Large or bold text, headings |
| #51A993 text on white | 2.82:1 | Fails | Lc 54.0 | Large or bold text, headings |
| #51A993 text on black | 7.44:1 | AAA | Lc -47.8 | 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
#F0F7F5
oklch(97% 0.008 177.3)
-
Step 100
100
#DFEEE9
oklch(93.7% 0.017 174)
-
Step 200
200
#C4E0D8
oklch(88.4% 0.032 176.5)
-
Step 300
300
#9ACDBE
oklch(80.8% 0.057 174.8)
-
Step 400
400 (this color)
#51A993
oklch(67.4% 0.092 174.8)
-
Step 500
500
#0DA085
oklch(63.1% 0.117 174.8)
-
Step 600
600
#008770
oklch(55.7% 0.105 175.1)
-
Step 700
700
#00715D
oklch(49% 0.093 174.7)
-
Step 800
800
#005D4C
oklch(42.7% 0.081 174.6)
-
Step 900
900
#004E3F
oklch(37.8% 0.072 174.1)
-
Step 950
950
#032E25
oklch(27% 0.048 174.9)
#51A993 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) | #A4A092 | 0.096 |
| Deuteranopia (no green cones) | #969695 | 0.091 |
| Tritanopia (no blue cones) | #27ABA2 | 0.028 |
| Achromatopsia (no color) | #9A9A9A | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51A993
#51A993
oklch(67.4% 0.092 174.8)
- #C37F99
#C37F99
oklch(67.4% 0.09 355.2)
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 #51A993, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greeny Blue #42B395 ΔE 0.029
- Dull Teal #5F9E8F ΔE 0.031
- Tea #65AB7C ΔE 0.037
- Light Sea Green #20B2AA ΔE 0.038
- Grey Teal #5E9B8A ΔE 0.039
- Cadet Blue #5F9EA0 ΔE 0.044
- Persian Green #2A9D8F ΔE 0.047
- Greeny Grey #7EA07A ΔE 0.051
Use #51A993 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.