#51BB9C
Closest named color: Greeny Blue (#42B395). oklch(72.1% 0.109 171.1), rgb(81, 187, 156).
Aa
Black text reads best on this color (8.93:1).
About this color
#51BB9C is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 72%, its chroma 0.109 and its hue 171°. Its hue sits on the cool side of the wheel. The nearest named color is Greeny Blue (#42B395), ΔE 0.027 away. Black text reads best on it, at 8.93:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Greeny Blue (#42B395) |
| Black text | 8.93:1 |
| White text | 2.34:1 |
Values
| HEX | #51BB9C |
| RGB | rgb(81, 187, 156) |
| HSL | hsl(162, 44%, 53%) |
| OKLCH | oklch(72.1% 0.109 171.1) |
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 #51BB9C | 2.34:1 | Fails | Lc -51.0 | Large or bold text, headings |
| Black text on #51BB9C | 8.93:1 | AAA | Lc 57.9 | Large or bold text, headings |
| #51BB9C text on white | 2.34:1 | Fails | Lc 46.1 | Large or bold text, headings |
| #51BB9C text on black | 8.93:1 | AAA | Lc -56.0 | 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
#F0F8F5
oklch(97.2% 0.009 171.8)
-
Step 100
100
#DEEEE8
oklch(93.6% 0.019 171.5)
-
Step 200
200
#C1E2D6
oklch(88.5% 0.038 171.4)
-
Step 300
300
#94CFBB
oklch(80.8% 0.067 171.5)
-
Step 400
400 (this color)
#51BB9C
oklch(72.1% 0.109 171.1)
-
Step 500
500
#00A180
oklch(63.1% 0.123 171.4)
-
Step 600
600
#00876B
oklch(55.5% 0.108 171.4)
-
Step 700
700
#007259
oklch(49.1% 0.097 170.7)
-
Step 800
800
#005D49
oklch(42.6% 0.083 171.6)
-
Step 900
900
#004E3C
oklch(37.7% 0.074 170.6)
-
Step 950
950
#002F23
oklch(27.2% 0.053 170.5)
#51BB9C 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) | #B6B09B | 0.112 |
| Deuteranopia (no green cones) | #A6A49E | 0.108 |
| Tritanopia (no blue cones) | #11BCB2 | 0.037 |
| Achromatopsia (no color) | #A9A9A9 | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51BB9C
#51BB9C
oklch(72.1% 0.109 171.1)
- #D988AD
#D988AD
oklch(72.1% 0.109 351.3)
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 #51BB9C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greeny Blue #42B395 ΔE 0.027
- Topaz #13BBAF ΔE 0.035
- Green Blue #01C08D ΔE 0.042
- Light Sea Green #20B2AA ΔE 0.046
- Greenblue #23C48B ΔE 0.047
- Tea #65AB7C ΔE 0.051
- Medium Aquamarine #66CDAA ΔE 0.056
- Faded Green #7BB274 ΔE 0.056
Use #51BB9C 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.