#31E4F3
Closest named color: Aqua Blue (#02D8E9). oklch(84.1% 0.135 203.8), rgb(49, 228, 243).
Aa
Black text reads best on this color (13.52:1).
About this color
#31E4F3 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 84%, its chroma 0.135 and its hue 204°. Its hue sits on the cool side of the wheel. The nearest named color is Aqua Blue (#02D8E9), ΔE 0.036 away. Black text reads best on it, at 13.52:1.
| Hue family | Teals and cyans |
| Lightness | light (84%) |
| Chroma | moderately saturated (0.135) |
| Temperature | cool |
| Nearest name | Aqua Blue (#02D8E9) |
| Black text | 13.52:1 |
| White text | 1.55:1 |
Values
| HEX | #31E4F3 |
| RGB | rgb(49, 228, 243) |
| HSL | hsl(185, 89%, 57%) |
| OKLCH | oklch(84.1% 0.135 203.8) |
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 #31E4F3 | 1.55:1 | Fails | Lc -28.2 | Dividers and decoration only |
| Black text on #31E4F3 | 13.52:1 | AAA | Lc 78.9 | Fine for body text |
| #31E4F3 text on white | 1.55:1 | Fails | Lc 24.9 | Dividers and decoration only |
| #31E4F3 text on black | 13.52:1 | AAA | Lc -78.2 | 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
#9DE8F0
oklch(88.5% 0.075 204.4)
-
Step 300
300 (this color)
#31E4F3
oklch(84.1% 0.135 203.8)
-
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)
#31E4F3 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) | #D1DAF4 | 0.134 |
| Deuteranopia (no green cones) | #B7C7F4 | 0.124 |
| Tritanopia (no blue cones) | #00EEE8 | 0.036 |
| Achromatopsia (no color) | #CFCFCF | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31E4F3
#31E4F3
oklch(84.1% 0.135 203.8)
- #FFB5AF
#FFB5AF
oklch(84.1% 0.087 24.3)
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 #31E4F3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Blue #02D8E9 ΔE 0.036
- Robin's Egg #6DEDFD ΔE 0.044
- Turquoise #40E0D0 ΔE 0.047
- Bright Light Blue #26F7FD ΔE 0.050
- Bright Aqua #0BF9EA ΔE 0.063
- Medium Turquoise #48D1CC ΔE 0.064
- Bright Cyan #41FDFE ΔE 0.068
- Bright Turquoise #0FFEF9 ΔE 0.070
Use #31E4F3 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.