#51ABBA
Closest named color: Turquoise Blue (#06B1C4). oklch(69.2% 0.088 209.8), rgb(81, 171, 186).
Aa
Black text reads best on this color (7.88:1).
About this color
#51ABBA is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 69%, its chroma 0.088 and its hue 210°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.031 away. Black text reads best on it, at 7.88:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 7.88:1 |
| White text | 2.66:1 |
Values
| HEX | #51ABBA |
| RGB | rgb(81, 171, 186) |
| HSL | hsl(189, 43%, 52%) |
| OKLCH | oklch(69.2% 0.088 209.8) |
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 #51ABBA | 2.66:1 | Fails | Lc -56.8 | Large or bold text, headings |
| Black text on #51ABBA | 7.88:1 | AAA | Lc 52.4 | Large or bold text, headings |
| #51ABBA text on white | 2.66:1 | Fails | Lc 51.6 | Large or bold text, headings |
| #51ABBA text on black | 7.88:1 | AAA | Lc -50.3 | 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
#DEEDF0
oklch(93.6% 0.016 211)
-
Step 200
200
#C3DFE4
oklch(88.5% 0.03 209.6)
-
Step 300
300
#97CBD4
oklch(80.9% 0.055 209.3)
-
Step 400
400 (this color)
#51ABBA
oklch(69.2% 0.088 209.8)
-
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)
#51ABBA 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) | #9EA5BB | 0.084 |
| Deuteranopia (no green cones) | #8E99BA | 0.077 |
| Tritanopia (no blue cones) | #00B2AF | 0.043 |
| Achromatopsia (no color) | #9E9E9E | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51ABBA
#51ABBA
oklch(69.2% 0.088 209.8)
- #CD877C
#CD877C
oklch(69.2% 0.088 29.3)
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 #51ABBA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.031
- Greyblue #77A1B5 ΔE 0.041
- Cadet Blue #5F9EA0 ΔE 0.044
- Light Sea Green #20B2AA ΔE 0.045
- Bluegrey #85A3B2 ΔE 0.053
- Topaz #13BBAF ΔE 0.058
- Bluey Grey #89A0B0 ΔE 0.060
- Dull Teal #5F9E8F ΔE 0.062
Use #51ABBA 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.