#31E0EF
Closest named color: Aqua Blue (#02D8E9). oklch(83% 0.133 204), rgb(49, 224, 239).
Aa
Black text reads best on this color (13.03:1).
About this color
#31E0EF is a light, moderately saturated teal or cyan. In OKLCH its lightness is 83%, its chroma 0.133 and its hue 204°. Its hue sits on the cool side of the wheel. The nearest named color is Aqua Blue (#02D8E9), ΔE 0.026 away. Black text reads best on it, at 13.03:1.
| Hue family | Teals and cyans |
| Lightness | light (83%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Aqua Blue (#02D8E9) |
| Black text | 13.03:1 |
| White text | 1.61:1 |
Values
| HEX | #31E0EF |
| RGB | rgb(49, 224, 239) |
| HSL | hsl(185, 86%, 56%) |
| OKLCH | oklch(83% 0.133 204) |
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 #31E0EF | 1.61:1 | Fails | Lc -30.4 | Non-text elements, placeholder text |
| Black text on #31E0EF | 13.03:1 | AAA | Lc 76.9 | Fine for body text |
| #31E0EF text on white | 1.61:1 | Fails | Lc 26.9 | Dividers and decoration only |
| #31E0EF text on black | 13.03:1 | AAA | Lc -76.1 | Fine for body text |
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 300.
-
Step 50
50
#E8F9FB
oklch(97% 0.018 205.3)
-
Step 100
100
#CDF2F6
oklch(93.6% 0.039 204.5)
-
Step 200
200
#9EE8F0
oklch(88.5% 0.074 204.5)
-
Step 300
300 (this color)
#31E0EF
oklch(83% 0.133 204)
-
Step 400
400
#00B6C3
oklch(70.8% 0.121 203.9)
-
Step 500
500
#009CA7
oklch(63.1% 0.108 203.6)
-
Step 600
600
#00838D
oklch(55.6% 0.095 204.2)
-
Step 700
700
#006E76
oklch(49.1% 0.084 203.6)
-
Step 800
800
#005A61
oklch(42.6% 0.073 204)
-
Step 900
900
#004B51
oklch(37.6% 0.064 204)
-
Step 950
950
#002D31
oklch(27.1% 0.046 204.1)
#31E0EF 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) | #CDD6F0 | 0.132 |
| Deuteranopia (no green cones) | #B4C4F0 | 0.122 |
| Tritanopia (no blue cones) | #00EAE4 | 0.037 |
| Achromatopsia (no color) | #CCCCCC | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31E0EF
#31E0EF
oklch(83% 0.133 204)
- #FFB0AA
#FFB0AA
oklch(83.1% 0.094 24.1)
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 #31E0EF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Blue #02D8E9 ΔE 0.026
- Turquoise #40E0D0 ΔE 0.044
- Robin's Egg #6DEDFD ΔE 0.053
- Medium Turquoise #48D1CC ΔE 0.054
- Dark Turquoise #00CED1 ΔE 0.061
- Bright Light Blue #26F7FD ΔE 0.061
- Vivid Sky Blue #4CC9F0 ΔE 0.064
- Sky Blue #87CEEB ΔE 0.067
Use #31E0EF 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.