#51B596
Closest named color: Greeny Blue (#42B395). oklch(70.5% 0.105 170.2), rgb(81, 181, 150).
Aa
Black text reads best on this color (8.39:1).
About this color
#51B596 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 70%, its chroma 0.105 and its hue 170°. Its hue sits on the cool side of the wheel. The nearest named color is Greeny Blue (#42B395), ΔE 0.013 away. Black text reads best on it, at 8.39:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Greeny Blue (#42B395) |
| Black text | 8.39:1 |
| White text | 2.50:1 |
Values
| HEX | #51B596 |
| RGB | rgb(81, 181, 150) |
| HSL | hsl(161, 40%, 51%) |
| OKLCH | oklch(70.5% 0.105 170.2) |
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 #51B596 | 2.50:1 | Fails | Lc -53.9 | Large or bold text, headings |
| Black text on #51B596 | 8.39:1 | AAA | Lc 55.2 | Large or bold text, headings |
| #51B596 text on white | 2.50:1 | Fails | Lc 48.8 | Large or bold text, headings |
| #51B596 text on black | 8.39:1 | AAA | Lc -53.1 | 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
#F0F7F4
oklch(97% 0.008 168.8)
-
Step 100
100
#DEEEE8
oklch(93.6% 0.019 171.5)
-
Step 200
200
#C2E1D5
oklch(88.4% 0.037 170.1)
-
Step 300
300
#96CFBA
oklch(80.9% 0.066 169.8)
-
Step 400
400 (this color)
#51B596
oklch(70.5% 0.105 170.2)
-
Step 500
500
#00A17E
oklch(63.1% 0.125 170.2)
-
Step 600
600
#00876A
oklch(55.5% 0.109 170.8)
-
Step 700
700
#007258
oklch(49.1% 0.097 169.9)
-
Step 800
800
#005D48
oklch(42.6% 0.084 170.6)
-
Step 900
900
#004E3C
oklch(37.7% 0.074 170.6)
-
Step 950
950
#002F22
oklch(27.1% 0.054 168.9)
#51B596 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) | #B0AA94 | 0.107 |
| Deuteranopia (no green cones) | #A19F98 | 0.103 |
| Tritanopia (no blue cones) | #1EB6AC | 0.036 |
| Achromatopsia (no color) | #A4A4A4 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51B596
#51B596
oklch(70.5% 0.105 170.2)
- #D184A9
#D184A9
oklch(70.4% 0.105 349.9)
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 #51B596, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greeny Blue #42B395 ΔE 0.013
- Tea #65AB7C ΔE 0.038
- Topaz #13BBAF ΔE 0.038
- Light Sea Green #20B2AA ΔE 0.039
- Green Blue #01C08D ΔE 0.047
- Dark Seafoam Green #3EAF76 ΔE 0.048
- Bluey Green #2BB179 ΔE 0.050
- Dark Seafoam #1FB57A ΔE 0.051
Use #51B596 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.