#51BCAF
Closest named color: Topaz (#13BBAF). oklch(72.9% 0.1 184.5), rgb(81, 188, 175).
Aa
Black text reads best on this color (9.16:1).
About this color
#51BCAF is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 73%, its chroma 0.100 and its hue 184°. Its hue sits on the cool side of the wheel. The nearest named color is Topaz (#13BBAF), ΔE 0.027 away. Black text reads best on it, at 9.16:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Topaz (#13BBAF) |
| Black text | 9.16:1 |
| White text | 2.29:1 |
Values
| HEX | #51BCAF |
| RGB | rgb(81, 188, 175) |
| HSL | hsl(173, 44%, 53%) |
| OKLCH | oklch(72.9% 0.1 184.5) |
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 #51BCAF | 2.29:1 | Fails | Lc -49.8 | Large or bold text, headings |
| Black text on #51BCAF | 9.16:1 | AAA | Lc 59.0 | Large or bold text, headings |
| #51BCAF text on white | 2.29:1 | Fails | Lc 45.0 | Non-text elements, placeholder text |
| #51BCAF text on black | 9.16:1 | AAA | Lc -57.2 | 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
#DDEEEB
oklch(93.6% 0.018 184.3)
-
Step 200
200
#C1E1DC
oklch(88.5% 0.034 185.1)
-
Step 300
300
#93CEC5
oklch(80.8% 0.062 184.3)
-
Step 400
400 (this color)
#51BCAF
oklch(72.9% 0.1 184.5)
-
Step 500
500
#009F92
oklch(63.2% 0.111 184.7)
-
Step 600
600
#00867A
oklch(55.7% 0.099 183.9)
-
Step 700
700
#007067
oklch(49% 0.086 185.2)
-
Step 800
800
#005C54
oklch(42.7% 0.075 184.7)
-
Step 900
900
#004D46
oklch(37.8% 0.067 184.5)
-
Step 950
950
#002E29
oklch(27.1% 0.048 183.6)
#51BCAF 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) | #B4B2AF | 0.108 |
| Deuteranopia (no green cones) | #A3A6B0 | 0.101 |
| Tritanopia (no blue cones) | #00C0B8 | 0.028 |
| Achromatopsia (no color) | #ABABAB | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51BCAF
#51BCAF
oklch(72.9% 0.1 184.5)
- #DD8DA0
#DD8DA0
oklch(73% 0.1 4.4)
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 #51BCAF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Topaz #13BBAF ΔE 0.027
- Light Sea Green #20B2AA ΔE 0.041
- Greeny Blue #42B395 ΔE 0.043
- Medium Aquamarine #66CDAA ΔE 0.056
- Dark Turquoise #00CED1 ΔE 0.058
- Turquoise Blue #06B1C4 ΔE 0.059
- Medium Turquoise #48D1CC ΔE 0.061
- Muted Teal #90B494 ΔE 0.063
Use #51BCAF 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.