#51AEB2
Closest named color: Light Sea Green (#20B2AA). oklch(69.6% 0.088 199.1), rgb(81, 174, 178).
Aa
Black text reads best on this color (8.04:1).
About this color
#51AEB2 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 70%, its chroma 0.088 and its hue 199°. Its hue sits on the cool side of the wheel. The nearest named color is Light Sea Green (#20B2AA), ΔE 0.032 away. Black text reads best on it, at 8.04:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Light Sea Green (#20B2AA) |
| Black text | 8.04:1 |
| White text | 2.60:1 |
Values
| HEX | #51AEB2 |
| RGB | rgb(81, 174, 178) |
| HSL | hsl(182, 39%, 51%) |
| OKLCH | oklch(69.6% 0.088 199.1) |
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 #51AEB2 | 2.60:1 | Fails | Lc -55.9 | Large or bold text, headings |
| Black text on #51AEB2 | 8.04:1 | AAA | Lc 53.3 | Large or bold text, headings |
| #51AEB2 text on white | 2.60:1 | Fails | Lc 50.7 | Large or bold text, headings |
| #51AEB2 text on black | 8.04:1 | AAA | Lc -51.2 | 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
#F0F7F7
oklch(97.1% 0.007 197)
-
Step 100
100
#DEEDEE
oklch(93.5% 0.016 201.7)
-
Step 200
200
#C3E0E1
oklch(88.6% 0.031 199.2)
-
Step 300
300
#97CCCE
oklch(80.9% 0.055 199)
-
Step 400
400 (this color)
#51AEB2
oklch(69.6% 0.088 199.1)
-
Step 500
500
#009DA2
oklch(63.2% 0.107 198.8)
-
Step 600
600
#008488
oklch(55.7% 0.095 198.5)
-
Step 700
700
#006F73
oklch(49.2% 0.084 199.2)
-
Step 800
800
#005B5E
oklch(42.8% 0.073 198.7)
-
Step 900
900
#004C4E
oklch(37.8% 0.064 197.8)
-
Step 950
950
#002D2F
oklch(27% 0.046 199.4)
#51AEB2 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) | #A3A7B2 | 0.090 |
| Deuteranopia (no green cones) | #939BB3 | 0.084 |
| Tritanopia (no blue cones) | #00B3AF | 0.034 |
| Achromatopsia (no color) | #A0A0A0 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51AEB2
#51AEB2
oklch(69.6% 0.088 199.1)
- #CE8787
#CE8787
oklch(69.6% 0.088 19.5)
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 #51AEB2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Sea Green #20B2AA ΔE 0.032
- Turquoise Blue #06B1C4 ΔE 0.035
- Topaz #13BBAF ΔE 0.045
- Cadet Blue #5F9EA0 ΔE 0.045
- Greyblue #77A1B5 ΔE 0.050
- Greeny Blue #42B395 ΔE 0.052
- Dull Teal #5F9E8F ΔE 0.057
- Bluegrey #85A3B2 ΔE 0.057
Use #51AEB2 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.