#51A4B7
Closest named color: Cadet Blue (#5F9EA0). oklch(67.4% 0.085 214.7), rgb(81, 164, 183).
Aa
Black text reads best on this color (7.34:1).
About this color
#51A4B7 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 67%, its chroma 0.085 and its hue 215°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.034 away. Black text reads best on it, at 7.34:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 7.34:1 |
| White text | 2.85:1 |
Values
| HEX | #51A4B7 |
| RGB | rgb(81, 164, 183) |
| HSL | hsl(191, 41%, 52%) |
| OKLCH | oklch(67.4% 0.085 214.7) |
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 #51A4B7 | 2.85:1 | Fails | Lc -59.9 | Large or bold text, headings |
| Black text on #51A4B7 | 7.34:1 | AAA | Lc 49.5 | Large or bold text, headings |
| #51A4B7 text on white | 2.85:1 | Fails | Lc 54.6 | Large or bold text, headings |
| #51A4B7 text on black | 7.34:1 | AAA | Lc -47.3 | 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
#F0F7F8
oklch(97.1% 0.008 207.1)
-
Step 100
100
#DFEDF0
oklch(93.7% 0.015 212)
-
Step 200
200
#C4DFE5
oklch(88.6% 0.03 212.6)
-
Step 300
300
#9ACAD6
oklch(80.9% 0.053 214.8)
-
Step 400
400 (this color)
#51A4B7
oklch(67.4% 0.085 214.7)
-
Step 500
500
#119AB2
oklch(63.2% 0.109 214.3)
-
Step 600
600
#008197
oklch(55.5% 0.098 215.2)
-
Step 700
700
#006D7F
oklch(49.2% 0.087 214.3)
-
Step 800
800
#005968
oklch(42.7% 0.075 214.2)
-
Step 900
900
#004A57
oklch(37.6% 0.066 214.5)
-
Step 950
950
#032C34
oklch(27% 0.045 214.2)
#51A4B7 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) | #969FB8 | 0.076 |
| Deuteranopia (no green cones) | #8794B7 | 0.069 |
| Tritanopia (no blue cones) | #00ABAA | 0.046 |
| Achromatopsia (no color) | #999999 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51A4B7
#51A4B7
oklch(67.4% 0.085 214.7)
- #C58473
#C58473
oklch(67.5% 0.085 35.3)
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 #51A4B7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.034
- Greyblue #77A1B5 ΔE 0.037
- Turquoise Blue #06B1C4 ΔE 0.042
- Bluegrey #85A3B2 ΔE 0.053
- Light Sea Green #20B2AA ΔE 0.055
- Dull Teal #5F9E8F ΔE 0.056
- Bluey Grey #89A0B0 ΔE 0.058
- Sea #3C9992 ΔE 0.062
Use #51A4B7 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.