#51AEBF
Closest named color: Turquoise Blue (#06B1C4). oklch(70.1% 0.091 211.2), rgb(81, 174, 191).
Aa
Black text reads best on this color (8.15:1).
About this color
#51AEBF is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 70%, its chroma 0.091 and its hue 211°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.029 away. Black text reads best on it, at 8.15:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 8.15:1 |
| White text | 2.57:1 |
Values
| HEX | #51AEBF |
| RGB | rgb(81, 174, 191) |
| HSL | hsl(189, 46%, 53%) |
| OKLCH | oklch(70.1% 0.091 211.2) |
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 #51AEBF | 2.57:1 | Fails | Lc -55.3 | Large or bold text, headings |
| Black text on #51AEBF | 8.15:1 | AAA | Lc 53.9 | Large or bold text, headings |
| #51AEBF text on white | 2.57:1 | Fails | Lc 50.1 | Large or bold text, headings |
| #51AEBF text on black | 8.15:1 | AAA | Lc -51.8 | 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
#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
#96CBD6
oklch(80.9% 0.057 211.9)
-
Step 400
400 (this color)
#51AEBF
oklch(70.1% 0.091 211.2)
-
Step 500
500
#009BAF
oklch(63.2% 0.11 210.8)
-
Step 600
600
#008293
oklch(55.6% 0.096 210.7)
-
Step 700
700
#006D7C
oklch(49% 0.085 211.2)
-
Step 800
800
#005966
oklch(42.6% 0.074 211.8)
-
Step 900
900
#004B55
oklch(37.8% 0.065 210)
-
Step 950
950
#002C33
oklch(26.9% 0.047 211.1)
#51AEBF 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) | #A0A8C0 | 0.085 |
| Deuteranopia (no green cones) | #8F9CBF | 0.077 |
| Tritanopia (no blue cones) | #00B5B3 | 0.043 |
| Achromatopsia (no color) | #A1A1A1 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51AEBF
#51AEBF
oklch(70.1% 0.091 211.2)
- #D1897C
#D1897C
oklch(70% 0.091 30.7)
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 #51AEBF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.029
- Greyblue #77A1B5 ΔE 0.045
- Light Sea Green #20B2AA ΔE 0.047
- Cadet Blue #5F9EA0 ΔE 0.053
- Bluegrey #85A3B2 ΔE 0.055
- Topaz #13BBAF ΔE 0.057
- Bluey Grey #89A0B0 ΔE 0.062
- Greeny Blue #42B395 ΔE 0.071
Use #51AEBF 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.