#27BFDF
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(74.4% 0.125 216.6), rgb(39, 191, 223).
Aa
Black text reads best on this color (9.60:1).
About this color
#27BFDF is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 74%, its chroma 0.125 and its hue 217°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.041 away. Black text reads best on it, at 9.60:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.125) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 9.60:1 |
| White text | 2.18:1 |
Values
| HEX | #27BFDF |
| RGB | rgb(39, 191, 223) |
| HSL | hsl(190, 74%, 51%) |
| OKLCH | oklch(74.4% 0.125 216.6) |
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 #27BFDF | 2.18:1 | Fails | Lc -47.2 | Large or bold text, headings |
| Black text on #27BFDF | 9.60:1 | AAA | Lc 61.4 | Content text, not long reading |
| #27BFDF text on white | 2.18:1 | Fails | Lc 42.5 | Non-text elements, placeholder text |
| #27BFDF text on black | 9.60:1 | AAA | Lc -59.7 | 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
#EEF7FA
oklch(97% 0.01 219.6)
-
Step 100
100
#DAEEF4
oklch(93.6% 0.023 217.6)
-
Step 200
200
#BAE1EC
oklch(88.5% 0.043 216.7)
-
Step 300
300
#84CEE1
oklch(81% 0.078 215.8)
-
Step 400
400 (this color)
#27BFDF
oklch(74.4% 0.125 216.6)
-
Step 500
500
#0099B5
oklch(63% 0.112 216.9)
-
Step 600
600
#008199
oklch(55.6% 0.099 216.9)
-
Step 700
700
#006C81
oklch(49% 0.088 217.4)
-
Step 800
800
#00596A
oklch(42.8% 0.076 216.6)
-
Step 900
900
#004A58
oklch(37.7% 0.067 215.8)
-
Step 950
950
#002C36
oklch(27% 0.048 217.4)
#27BFDF 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) | #AAB9E1 | 0.110 |
| Deuteranopia (no green cones) | #92A8DF | 0.098 |
| Tritanopia (no blue cones) | #00CAC9 | 0.052 |
| Achromatopsia (no color) | #AFAFAF | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #27BFDF
#27BFDF
oklch(74.4% 0.125 216.6)
- #F08E73
#F08E73
oklch(74.4% 0.126 36.2)
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 #27BFDF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.041
- Deep Sky Blue #00BFFF ΔE 0.047
- Bright Sky Blue #02CCFE ΔE 0.049
- Turquoise Blue #06B1C4 ΔE 0.052
- Dark Turquoise #00CED1 ΔE 0.053
- Aqua Blue #02D8E9 ΔE 0.067
- Medium Turquoise #48D1CC ΔE 0.068
- Topaz #13BBAF ΔE 0.071
Use #27BFDF 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.