#51ABA3
Closest named color: Light Sea Green (#20B2AA). oklch(68.4% 0.087 187.6), rgb(81, 171, 163).
Aa
Black text reads best on this color (7.70:1).
About this color
#51ABA3 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 68%, its chroma 0.087 and its hue 188°. Its hue sits on the cool side of the wheel. The nearest named color is Light Sea Green (#20B2AA), ΔE 0.028 away. Black text reads best on it, at 7.70:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Light Sea Green (#20B2AA) |
| Black text | 7.70:1 |
| White text | 2.72:1 |
Values
| HEX | #51ABA3 |
| RGB | rgb(81, 171, 163) |
| HSL | hsl(175, 36%, 49%) |
| OKLCH | oklch(68.4% 0.087 187.6) |
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 #51ABA3 | 2.72:1 | Fails | Lc -57.8 | Large or bold text, headings |
| Black text on #51ABA3 | 7.70:1 | AAA | Lc 51.5 | Large or bold text, headings |
| #51ABA3 text on white | 2.72:1 | Fails | Lc 52.6 | Large or bold text, headings |
| #51ABA3 text on black | 7.70:1 | AAA | Lc -49.3 | 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
#DFEDEC
oklch(93.5% 0.015 191.8)
-
Step 200
200
#C4E0DC
oklch(88.5% 0.03 186.2)
-
Step 300
300
#99CCC7
oklch(80.8% 0.054 188.7)
-
Step 400
400 (this color)
#51ABA3
oklch(68.4% 0.087 187.6)
-
Step 500
500
#009E95
oklch(63% 0.11 187.7)
-
Step 600
600
#00857D
oklch(55.5% 0.097 187.4)
-
Step 700
700
#007069
oklch(49.1% 0.086 187.3)
-
Step 800
800
#005C56
oklch(42.8% 0.075 187.1)
-
Step 900
900
#004D48
oklch(37.8% 0.066 187.3)
-
Step 950
950
#012D2A
oklch(26.8% 0.046 187.8)
#51ABA3 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) | #A3A3A3 | 0.093 |
| Deuteranopia (no green cones) | #9498A4 | 0.087 |
| Tritanopia (no blue cones) | #13AFA8 | 0.028 |
| Achromatopsia (no color) | #9D9D9D | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51ABA3
#51ABA3
oklch(68.4% 0.087 187.6)
- #C88390
#C88390
oklch(68.4% 0.086 7.3)
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 #51ABA3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Sea Green #20B2AA ΔE 0.028
- Cadet Blue #5F9EA0 ΔE 0.037
- Greeny Blue #42B395 ΔE 0.037
- Dull Teal #5F9E8F ΔE 0.039
- Topaz #13BBAF ΔE 0.047
- Grey Teal #5E9B8A ΔE 0.048
- Turquoise Blue #06B1C4 ΔE 0.050
- Persian Green #2A9D8F ΔE 0.056
Use #51ABA3 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.