#51A2BF
Closest named color: Greyblue (#77A1B5). oklch(67.3% 0.09 224), rgb(81, 162, 191).
Aa
Black text reads best on this color (7.27:1).
About this color
#51A2BF is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 67%, its chroma 0.090 and its hue 224°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.038 away. Black text reads best on it, at 7.27:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.27:1 |
| White text | 2.88:1 |
Values
| HEX | #51A2BF |
| RGB | rgb(81, 162, 191) |
| HSL | hsl(196, 46%, 53%) |
| OKLCH | oklch(67.3% 0.09 224) |
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 #51A2BF | 2.88:1 | Fails | Lc -60.3 | Content text, not long reading |
| Black text on #51A2BF | 7.27:1 | AAA | Lc 49.1 | Large or bold text, headings |
| #51A2BF text on white | 2.88:1 | Fails | Lc 55.0 | Large or bold text, headings |
| #51A2BF text on black | 7.27:1 | AAA | Lc -46.8 | 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
#F0F7F9
oklch(97.1% 0.008 216.6)
-
Step 100
100
#DFECF2
oklch(93.5% 0.016 227)
-
Step 200
200
#C4DEE9
oklch(88.5% 0.032 225.1)
-
Step 300
300
#9AC9DC
oklch(80.9% 0.056 224.7)
-
Step 400
400 (this color)
#51A2BF
oklch(67.3% 0.09 224)
-
Step 500
500
#1597BD
oklch(63% 0.115 224.7)
-
Step 600
600
#0080A0
oklch(55.7% 0.104 223.4)
-
Step 700
700
#006B87
oklch(49% 0.092 224)
-
Step 800
800
#00586F
oklch(42.7% 0.08 223.4)
-
Step 900
900
#00495D
oklch(37.7% 0.071 223.8)
-
Step 950
950
#042B37
oklch(26.9% 0.047 223.4)
#51A2BF 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) | #929FC1 | 0.071 |
| Deuteranopia (no green cones) | #8293BF | 0.063 |
| Tritanopia (no blue cones) | #00ABAB | 0.057 |
| Achromatopsia (no color) | #989898 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51A2BF
#51A2BF
oklch(67.3% 0.09 224)
- #C58468
#C58468
oklch(67.3% 0.09 44.1)
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 #51A2BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.038
- Cadet Blue #5F9EA0 ΔE 0.045
- Turquoise Blue #06B1C4 ΔE 0.047
- Bluegrey #85A3B2 ΔE 0.056
- Bluey Grey #89A0B0 ΔE 0.060
- Faded Blue #658CBB ΔE 0.062
- Silver Lake Blue #778DA9 ΔE 0.065
- Blue Grey #758DA3 ΔE 0.066
Use #51A2BF 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.