#51B1C1
Closest named color: Turquoise Blue (#06B1C4). oklch(70.9% 0.093 209.9), rgb(81, 177, 193).
Aa
Black text reads best on this color (8.40:1).
About this color
#51B1C1 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 71%, its chroma 0.093 and its hue 210°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.030 away. Black text reads best on it, at 8.40:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 8.40:1 |
| White text | 2.49:1 |
Values
| HEX | #51B1C1 |
| RGB | rgb(81, 177, 193) |
| HSL | hsl(189, 47%, 54%) |
| OKLCH | oklch(70.9% 0.093 209.9) |
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 #51B1C1 | 2.49:1 | Fails | Lc -53.9 | Large or bold text, headings |
| Black text on #51B1C1 | 8.40:1 | AAA | Lc 55.2 | Large or bold text, headings |
| #51B1C1 text on white | 2.49:1 | Fails | Lc 48.8 | Large or bold text, headings |
| #51B1C1 text on black | 8.40:1 | AAA | Lc -53.2 | 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
#DEEDF0
oklch(93.6% 0.016 211)
-
Step 200
200
#C2DFE5
oklch(88.4% 0.032 211.6)
-
Step 300
300
#95CBD5
oklch(80.8% 0.058 210.2)
-
Step 400
400 (this color)
#51B1C1
oklch(70.9% 0.093 209.9)
-
Step 500
500
#009BAE
oklch(63.2% 0.109 210)
-
Step 600
600
#008292
oklch(55.6% 0.096 209.8)
-
Step 700
700
#006D7B
oklch(49% 0.085 210.2)
-
Step 800
800
#005A65
oklch(42.8% 0.074 209.1)
-
Step 900
900
#004B55
oklch(37.8% 0.065 210)
-
Step 950
950
#002C33
oklch(26.9% 0.047 211.1)
#51B1C1 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) | #A3ABC2 | 0.088 |
| Deuteranopia (no green cones) | #929EC1 | 0.081 |
| Tritanopia (no blue cones) | #00B8B6 | 0.042 |
| Achromatopsia (no color) | #A4A4A4 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51B1C1
#51B1C1
oklch(70.9% 0.093 209.9)
- #D58B7F
#D58B7F
oklch(70.9% 0.093 29.6)
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 #51B1C1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.030
- Light Sea Green #20B2AA ΔE 0.047
- Greyblue #77A1B5 ΔE 0.051
- Topaz #13BBAF ΔE 0.053
- Bluegrey #85A3B2 ΔE 0.058
- Cadet Blue #5F9EA0 ΔE 0.060
- Bluey Grey #89A0B0 ΔE 0.066
- Greeny Blue #42B395 ΔE 0.070
Use #51B1C1 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.