#51C2BF
Closest named color: Dark Turquoise (#00CED1). oklch(74.9% 0.102 192.8), rgb(81, 194, 191).
Aa
Black text reads best on this color (9.81:1).
About this color
#51C2BF is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 75%, its chroma 0.102 and its hue 193°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Turquoise (#00CED1), ΔE 0.038 away. Black text reads best on it, at 9.81:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (75%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Dark Turquoise (#00CED1) |
| Black text | 9.81:1 |
| White text | 2.13:1 |
Values
| HEX | #51C2BF |
| RGB | rgb(81, 194, 191) |
| HSL | hsl(178, 48%, 54%) |
| OKLCH | oklch(74.9% 0.102 192.8) |
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 #51C2BF | 2.13:1 | Fails | Lc -46.4 | Large or bold text, headings |
| Black text on #51C2BF | 9.81:1 | AAA | Lc 62.2 | Content text, not long reading |
| #51C2BF text on white | 2.13:1 | Fails | Lc 41.7 | Non-text elements, placeholder text |
| #51C2BF text on black | 9.81:1 | AAA | Lc -60.5 | Content text, not long reading |
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
#EFF7F7
oklch(97% 0.008 197)
-
Step 100
100
#DDEEED
oklch(93.6% 0.018 192.6)
-
Step 200
200
#BFE1DF
oklch(88.5% 0.036 192.2)
-
Step 300
300
#90CECC
oklch(80.9% 0.063 193.4)
-
Step 400
400 (this color)
#51C2BF
oklch(74.9% 0.102 192.8)
-
Step 500
500
#009E9B
oklch(63.2% 0.108 192.4)
-
Step 600
600
#008482
oklch(55.5% 0.095 192.9)
-
Step 700
700
#006F6E
oklch(49% 0.084 193.7)
-
Step 800
800
#005B5A
oklch(42.6% 0.073 193.5)
-
Step 900
900
#004C4B
oklch(37.7% 0.064 193.2)
-
Step 950
950
#002D2D
oklch(26.9% 0.046 194.8)
#51C2BF 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) | #B7B9BF | 0.107 |
| Deuteranopia (no green cones) | #A5ACC0 | 0.100 |
| Tritanopia (no blue cones) | #00C7C1 | 0.027 |
| Achromatopsia (no color) | #B1B1B1 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51C2BF
#51C2BF
oklch(74.9% 0.102 192.8)
- #E6929B
#E6929B
oklch(74.8% 0.102 12.9)
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 #51C2BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Turquoise #00CED1 ΔE 0.038
- Medium Turquoise #48D1CC ΔE 0.040
- Topaz #13BBAF ΔE 0.042
- Medium Aquamarine #66CDAA ΔE 0.053
- Pale Teal #82CBB2 ΔE 0.056
- Light Sea Green #20B2AA ΔE 0.060
- Seafoam Blue #78D1B6 ΔE 0.060
- Turquoise Blue #06B1C4 ΔE 0.063
Use #51C2BF 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.