#51BEAA
Closest named color: Topaz (#13BBAF). oklch(73.3% 0.104 179.2), rgb(81, 190, 170).
Aa
Black text reads best on this color (9.29:1).
About this color
#51BEAA is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 73%, its chroma 0.104 and its hue 179°. Its hue sits on the cool side of the wheel. The nearest named color is Topaz (#13BBAF), ΔE 0.030 away. Black text reads best on it, at 9.29:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Topaz (#13BBAF) |
| Black text | 9.29:1 |
| White text | 2.25:1 |
Values
| HEX | #51BEAA |
| RGB | rgb(81, 190, 170) |
| HSL | hsl(169, 46%, 53%) |
| OKLCH | oklch(73.3% 0.104 179.2) |
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 #51BEAA | 2.25:1 | Fails | Lc -49.1 | Large or bold text, headings |
| Black text on #51BEAA | 9.29:1 | AAA | Lc 59.7 | Large or bold text, headings |
| #51BEAA text on white | 2.25:1 | Fails | Lc 44.3 | Non-text elements, placeholder text |
| #51BEAA text on black | 9.29:1 | AAA | Lc -57.9 | 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
#F0F7F5
oklch(97% 0.008 177.3)
-
Step 100
100
#DDEEEA
oklch(93.5% 0.019 180.3)
-
Step 200
200
#C1E1DA
oklch(88.5% 0.035 180.8)
-
Step 300
300
#92CFC1
oklch(80.9% 0.066 178.7)
-
Step 400
400 (this color)
#51BEAA
oklch(73.3% 0.104 179.2)
-
Step 500
500
#00A08B
oklch(63.2% 0.115 179)
-
Step 600
600
#008675
oklch(55.5% 0.101 179.7)
-
Step 700
700
#007162
oklch(49.1% 0.09 179.3)
-
Step 800
800
#005D50
oklch(42.8% 0.078 178.9)
-
Step 900
900
#004D42
oklch(37.6% 0.069 179)
-
Step 950
950
#002E27
oklch(27% 0.049 179.5)
#51BEAA 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) | #B7B4A9 | 0.110 |
| Deuteranopia (no green cones) | #A6A7AC | 0.106 |
| Tritanopia (no blue cones) | #00C1B8 | 0.030 |
| Achromatopsia (no color) | #ACACAC | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51BEAA
#51BEAA
oklch(73.3% 0.104 179.2)
- #DE8CA7
#DE8CA7
oklch(73.2% 0.105 358.8)
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 #51BEAA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Topaz #13BBAF ΔE 0.030
- Greeny Blue #42B395 ΔE 0.041
- Light Sea Green #20B2AA ΔE 0.046
- Medium Aquamarine #66CDAA ΔE 0.048
- Green Blue #01C08D ΔE 0.056
- Greenblue #23C48B ΔE 0.059
- Dark Turquoise #00CED1 ΔE 0.059
- Medium Turquoise #48D1CC ΔE 0.060
Use #51BEAA 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.