#51ADCD
Closest named color: Turquoise Blue (#06B1C4). oklch(70.4% 0.099 223.8), rgb(81, 173, 205).
Aa
Black text reads best on this color (8.20:1).
About this color
#51ADCD is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 70%, its chroma 0.099 and its hue 224°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.037 away. Black text reads best on it, at 8.20:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 8.20:1 |
| White text | 2.55:1 |
Values
| HEX | #51ADCD |
| RGB | rgb(81, 173, 205) |
| HSL | hsl(195, 55%, 56%) |
| OKLCH | oklch(70.4% 0.099 223.8) |
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 #51ADCD | 2.55:1 | Fails | Lc -55.0 | Large or bold text, headings |
| Black text on #51ADCD | 8.20:1 | AAA | Lc 54.2 | Large or bold text, headings |
| #51ADCD text on white | 2.55:1 | Fails | Lc 49.9 | Large or bold text, headings |
| #51ADCD text on black | 8.20:1 | AAA | Lc -52.1 | 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
#F0F7FA
oklch(97.2% 0.008 225.1)
-
Step 100
100
#DEEDF3
oklch(93.7% 0.018 223.6)
-
Step 200
200
#C2DFEA
oklch(88.6% 0.034 222.7)
-
Step 300
300
#95CADE
oklch(80.9% 0.062 223.2)
-
Step 400
400 (this color)
#51ADCD
oklch(70.4% 0.099 223.8)
-
Step 500
500
#0098BE
oklch(63.1% 0.118 223.7)
-
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
#002B39
oklch(26.9% 0.051 225.5)
#51ADCD 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) | #9BA9CF | 0.078 |
| Deuteranopia (no green cones) | #899CCD | 0.069 |
| Tritanopia (no blue cones) | #00B7B7 | 0.059 |
| Achromatopsia (no color) | #A2A2A2 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51ADCD
#51ADCD
oklch(70.4% 0.099 223.8)
- #D48B6D
#D48B6D
oklch(70.4% 0.099 43.1)
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 #51ADCD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.037
- Greyblue #77A1B5 ΔE 0.049
- Bluegrey #85A3B2 ΔE 0.059
- Bluey Grey #89A0B0 ΔE 0.066
- Light Sea Green #20B2AA ΔE 0.067
- Cadet Blue #5F9EA0 ΔE 0.067
- Topaz #13BBAF ΔE 0.075
- Cool Steel #97A7B3 ΔE 0.076
Use #51ADCD 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.