#51ABB5
Closest named color: Turquoise Blue (#06B1C4). oklch(69% 0.087 205.1), rgb(81, 171, 181).
Aa
Black text reads best on this color (7.84:1).
About this color
#51ABB5 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 69%, its chroma 0.087 and its hue 205°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.033 away. Black text reads best on it, at 7.84:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 7.84:1 |
| White text | 2.67:1 |
Values
| HEX | #51ABB5 |
| RGB | rgb(81, 171, 181) |
| HSL | hsl(186, 40%, 51%) |
| OKLCH | oklch(69% 0.087 205.1) |
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 #51ABB5 | 2.67:1 | Fails | Lc -57.0 | Large or bold text, headings |
| Black text on #51ABB5 | 7.84:1 | AAA | Lc 52.2 | Large or bold text, headings |
| #51ABB5 text on white | 2.67:1 | Fails | Lc 51.8 | Large or bold text, headings |
| #51ABB5 text on black | 7.84:1 | AAA | Lc -50.1 | 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
#DFEDEF
oklch(93.6% 0.015 207.1)
-
Step 200
200
#C3DFE3
oklch(88.4% 0.03 207.1)
-
Step 300
300
#98CBD1
oklch(80.9% 0.054 205.2)
-
Step 400
400 (this color)
#51ABB5
oklch(69% 0.087 205.1)
-
Step 500
500
#009CA8
oklch(63.2% 0.108 204.4)
-
Step 600
600
#00838E
oklch(55.7% 0.095 205.2)
-
Step 700
700
#006E77
oklch(49.1% 0.084 204.7)
-
Step 800
800
#005A62
oklch(42.7% 0.073 205.3)
-
Step 900
900
#004B52
oklch(37.7% 0.064 205.5)
-
Step 950
950
#002D31
oklch(27.1% 0.046 204.1)
#51ABB5 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) | #9FA5B6 | 0.086 |
| Deuteranopia (no green cones) | #8F99B5 | 0.079 |
| Tritanopia (no blue cones) | #00B1AE | 0.038 |
| Achromatopsia (no color) | #9E9E9E | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51ABB5
#51ABB5
oklch(69% 0.087 205.1)
- #CC8680
#CC8680
oklch(69% 0.087 24.9)
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 #51ABB5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.033
- Light Sea Green #20B2AA ΔE 0.039
- Cadet Blue #5F9EA0 ΔE 0.040
- Greyblue #77A1B5 ΔE 0.043
- Bluegrey #85A3B2 ΔE 0.054
- Topaz #13BBAF ΔE 0.054
- Dull Teal #5F9E8F ΔE 0.056
- Bluey Grey #89A0B0 ΔE 0.061
Use #51ABB5 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.