#51A99D
Closest named color: Dull Teal (#5F9E8F). oklch(67.7% 0.087 183.7), rgb(81, 169, 157).
Aa
Black text reads best on this color (7.51:1).
About this color
#51A99D is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 68%, its chroma 0.087 and its hue 184°. Its hue sits on the cool side of the wheel. The nearest named color is Dull Teal (#5F9E8F), ΔE 0.032 away. Black text reads best on it, at 7.51:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Dull Teal (#5F9E8F) |
| Black text | 7.51:1 |
| White text | 2.79:1 |
Values
| HEX | #51A99D |
| RGB | rgb(81, 169, 157) |
| HSL | hsl(172, 35%, 49%) |
| OKLCH | oklch(67.7% 0.087 183.7) |
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 #51A99D | 2.79:1 | Fails | Lc -58.9 | Large or bold text, headings |
| Black text on #51A99D | 7.51:1 | AAA | Lc 50.4 | Large or bold text, headings |
| #51A99D text on white | 2.79:1 | Fails | Lc 53.6 | Large or bold text, headings |
| #51A99D text on black | 7.51:1 | AAA | Lc -48.2 | 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
#F0F7F6
oklch(97.1% 0.008 186.9)
-
Step 100
100
#DFEDEB
oklch(93.5% 0.015 186.7)
-
Step 200
200
#C4E0DB
oklch(88.5% 0.03 183.7)
-
Step 300
300
#9ACDC4
oklch(81% 0.055 182.9)
-
Step 400
400 (this color)
#51A99D
oklch(67.7% 0.087 183.7)
-
Step 500
500
#079F91
oklch(63.2% 0.111 183.9)
-
Step 600
600
#008679
oklch(55.7% 0.099 183.1)
-
Step 700
700
#007066
oklch(49% 0.087 184.2)
-
Step 800
800
#005C53
oklch(42.6% 0.076 183.4)
-
Step 900
900
#004D45
oklch(37.7% 0.067 183.1)
-
Step 950
950
#032E29
oklch(27.2% 0.046 183.3)
#51A99D 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) | #A2A19D | 0.092 |
| Deuteranopia (no green cones) | #94969E | 0.088 |
| Tritanopia (no blue cones) | #1DACA5 | 0.027 |
| Achromatopsia (no color) | #9B9B9B | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51A99D
#51A99D
oklch(67.7% 0.087 183.7)
- #C58191
#C58191
oklch(67.8% 0.086 4.3)
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 #51A99D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Teal #5F9E8F ΔE 0.032
- Light Sea Green #20B2AA ΔE 0.032
- Cadet Blue #5F9EA0 ΔE 0.035
- Greeny Blue #42B395 ΔE 0.036
- Grey Teal #5E9B8A ΔE 0.041
- Persian Green #2A9D8F ΔE 0.049
- Tea #65AB7C ΔE 0.050
- Sea #3C9992 ΔE 0.052
Use #51A99D 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.