#51ACA0
Closest named color: Light Sea Green (#20B2AA). oklch(68.5% 0.089 184), rgb(81, 172, 160).
Aa
Black text reads best on this color (7.75:1).
About this color
#51ACA0 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 69%, its chroma 0.089 and its hue 184°. Its hue sits on the cool side of the wheel. The nearest named color is Light Sea Green (#20B2AA), ΔE 0.027 away. Black text reads best on it, at 7.75:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Light Sea Green (#20B2AA) |
| Black text | 7.75:1 |
| White text | 2.70:1 |
Values
| HEX | #51ACA0 |
| RGB | rgb(81, 172, 160) |
| HSL | hsl(172, 36%, 50%) |
| OKLCH | oklch(68.5% 0.089 184) |
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 #51ACA0 | 2.70:1 | Fails | Lc -57.5 | Large or bold text, headings |
| Black text on #51ACA0 | 7.75:1 | AAA | Lc 51.7 | Large or bold text, headings |
| #51ACA0 text on white | 2.70:1 | Fails | Lc 52.3 | Large or bold text, headings |
| #51ACA0 text on black | 7.75:1 | AAA | Lc -49.6 | 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
#F0F7F6
oklch(97.1% 0.008 186.9)
-
Step 100
100
#DFEEEB
oklch(93.7% 0.016 182.7)
-
Step 200
200
#C4E0DB
oklch(88.5% 0.03 183.7)
-
Step 300
300
#99CDC4
oklch(80.9% 0.056 183.1)
-
Step 400
400 (this color)
#51ACA0
oklch(68.5% 0.089 184)
-
Step 500
500
#009F91
oklch(63.1% 0.112 184)
-
Step 600
600
#00867A
oklch(55.7% 0.099 183.9)
-
Step 700
700
#007066
oklch(49% 0.087 184.2)
-
Step 800
800
#005C54
oklch(42.7% 0.075 184.7)
-
Step 900
900
#004D45
oklch(37.7% 0.067 183.1)
-
Step 950
950
#012E29
oklch(27.1% 0.047 183.5)
#51ACA0 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) | #A5A3A0 | 0.096 |
| Deuteranopia (no green cones) | #9699A1 | 0.089 |
| Tritanopia (no blue cones) | #17AFA8 | 0.028 |
| Achromatopsia (no color) | #9D9D9D | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51ACA0
#51ACA0
oklch(68.5% 0.089 184)
- #C98394
#C98394
oklch(68.7% 0.089 3.8)
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 #51ACA0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Sea Green #20B2AA ΔE 0.027
- Greeny Blue #42B395 ΔE 0.032
- Dull Teal #5F9E8F ΔE 0.040
- Cadet Blue #5F9EA0 ΔE 0.041
- Topaz #13BBAF ΔE 0.044
- Grey Teal #5E9B8A ΔE 0.049
- Tea #65AB7C ΔE 0.051
- Turquoise Blue #06B1C4 ΔE 0.054
Use #51ACA0 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.