#51A397
Closest named color: Dull Teal (#5F9E8F). oklch(66% 0.083 183), rgb(81, 163, 151).
Aa
Black text reads best on this color (7.03:1).
About this color
#51A397 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 66%, its chroma 0.083 and its hue 183°. Its hue sits on the cool side of the wheel. The nearest named color is Dull Teal (#5F9E8F), ΔE 0.017 away. Black text reads best on it, at 7.03:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Dull Teal (#5F9E8F) |
| Black text | 7.03:1 |
| White text | 2.98:1 |
Values
| HEX | #51A397 |
| RGB | rgb(81, 163, 151) |
| HSL | hsl(171, 34%, 48%) |
| OKLCH | oklch(66% 0.083 183) |
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 #51A397 | 2.98:1 | Fails | Lc -61.6 | Content text, not long reading |
| Black text on #51A397 | 7.03:1 | AAA | Lc 47.7 | Large or bold text, headings |
| #51A397 text on white | 2.98:1 | Fails | Lc 56.3 | Large or bold text, headings |
| #51A397 text on black | 7.03:1 | AAA | Lc -45.5 | 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 500.
-
Step 50
50
#F2F7F6
oklch(97.2% 0.005 183)
-
Step 100
100
#E2EDEA
oklch(93.7% 0.012 178)
-
Step 200
200
#CADEDA
oklch(88.5% 0.022 182.5)
-
Step 300
300
#A5CAC3
oklch(81% 0.041 182.5)
-
Step 400
400
#72AEA4
oklch(70.7% 0.064 182.8)
-
Step 500
500 (this color)
#51A397
oklch(66% 0.083 183)
-
Step 600
600
#218478
oklch(55.5% 0.09 183)
-
Step 700
700
#107065
oklch(49.1% 0.084 182.8)
-
Step 800
800
#135B52
oklch(42.6% 0.069 182.6)
-
Step 900
900
#1A4B44
oklch(37.7% 0.054 182.4)
-
Step 950
950
#112C28
oklch(27% 0.034 182.9)
#51A397 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) | #9C9B97 | 0.087 |
| Deuteranopia (no green cones) | #8F9198 | 0.083 |
| Tritanopia (no blue cones) | #27A69F | 0.025 |
| Achromatopsia (no color) | #959595 | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51A397
#51A397
oklch(66% 0.083 183)
- #BD7D8D
#BD7D8D
oklch(66% 0.082 3.2)
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 #51A397, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Teal #5F9E8F ΔE 0.017
- Grey Teal #5E9B8A ΔE 0.025
- Cadet Blue #5F9EA0 ΔE 0.026
- Persian Green #2A9D8F ΔE 0.035
- Sea #3C9992 ΔE 0.036
- Light Sea Green #20B2AA ΔE 0.045
- Blue Green #0F9B8E ΔE 0.047
- Greeny Blue #42B395 ΔE 0.048
Use #51A397 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.