#51BFC2
Closest named color: Topaz (#13BBAF). oklch(74.3% 0.1 197.7), rgb(81, 191, 194).
Aa
Black text reads best on this color (9.58:1).
About this color
#51BFC2 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 74%, its chroma 0.100 and its hue 198°. Its hue sits on the cool side of the wheel. The nearest named color is Topaz (#13BBAF), ΔE 0.042 away. Black text reads best on it, at 9.58:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Topaz (#13BBAF) |
| Black text | 9.58:1 |
| White text | 2.19:1 |
Values
| HEX | #51BFC2 |
| RGB | rgb(81, 191, 194) |
| HSL | hsl(182, 48%, 54%) |
| OKLCH | oklch(74.3% 0.1 197.7) |
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 #51BFC2 | 2.19:1 | Fails | Lc -47.6 | Large or bold text, headings |
| Black text on #51BFC2 | 9.58:1 | AAA | Lc 61.1 | Content text, not long reading |
| #51BFC2 text on white | 2.19:1 | Fails | Lc 42.9 | Non-text elements, placeholder text |
| #51BFC2 text on black | 9.58:1 | AAA | Lc -59.3 | 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
#EFF7F7
oklch(97% 0.008 197)
-
Step 100
100
#DDEEEE
oklch(93.7% 0.018 196.8)
-
Step 200
200
#C0E1E1
oklch(88.6% 0.035 196.5)
-
Step 300
300
#91CDCF
oklch(80.8% 0.061 198.6)
-
Step 400
400 (this color)
#51BFC2
oklch(74.3% 0.1 197.7)
-
Step 500
500
#009DA0
oklch(63.1% 0.107 197.2)
-
Step 600
600
#008487
oklch(55.6% 0.095 197.6)
-
Step 700
700
#006F72
oklch(49.2% 0.084 198.1)
-
Step 800
800
#005B5D
oklch(42.7% 0.073 197.4)
-
Step 900
900
#004C4E
oklch(37.8% 0.064 197.8)
-
Step 950
950
#002D2E
oklch(27% 0.046 197.1)
#51BFC2 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) | #B3B7C2 | 0.103 |
| Deuteranopia (no green cones) | #A1A9C3 | 0.097 |
| Tritanopia (no blue cones) | #00C5C0 | 0.031 |
| Achromatopsia (no color) | #AFAFAF | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51BFC2
#51BFC2
oklch(74.3% 0.1 197.7)
- #E49294
#E49294
oklch(74.4% 0.1 18.1)
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 #51BFC2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Topaz #13BBAF ΔE 0.042
- Dark Turquoise #00CED1 ΔE 0.043
- Medium Turquoise #48D1CC ΔE 0.048
- Turquoise Blue #06B1C4 ΔE 0.055
- Light Sea Green #20B2AA ΔE 0.056
- Medium Aquamarine #66CDAA ΔE 0.063
- Pale Teal #82CBB2 ΔE 0.064
- Vivid Sky Blue #4CC9F0 ΔE 0.065
Use #51BFC2 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.