#31D4FA
Closest named color: Bright Sky Blue (#02CCFE). oklch(80.6% 0.136 218.3), rgb(49, 212, 250).
Aa
Black text reads best on this color (11.92:1).
About this color
#31D4FA is a light, moderately saturated teal or cyan. In OKLCH its lightness is 81%, its chroma 0.136 and its hue 218°. Its hue sits on the cool side of the wheel. The nearest named color is Bright Sky Blue (#02CCFE), ΔE 0.028 away. Black text reads best on it, at 11.92:1.
| Hue family | Teals and cyans |
| Lightness | light (81%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Bright Sky Blue (#02CCFE) |
| Black text | 11.92:1 |
| White text | 1.76:1 |
Values
| HEX | #31D4FA |
| RGB | rgb(49, 212, 250) |
| HSL | hsl(191, 95%, 59%) |
| OKLCH | oklch(80.6% 0.136 218.3) |
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 #31D4FA | 1.76:1 | Fails | Lc -35.7 | Non-text elements, placeholder text |
| Black text on #31D4FA | 11.92:1 | AAA | Lc 72.1 | Content text, not long reading |
| #31D4FA text on white | 1.76:1 | Fails | Lc 31.7 | Non-text elements, placeholder text |
| #31D4FA text on black | 11.92:1 | AAA | Lc -71.0 | 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 300.
-
Step 50
50
#E9F9FE
oklch(97.2% 0.018 218.4)
-
Step 100
100
#CEF1FC
oklch(93.7% 0.039 218.7)
-
Step 200
200
#A0E6FB
oklch(88.6% 0.075 218.5)
-
Step 300
300 (this color)
#31D4FA
oklch(80.6% 0.136 218.3)
-
Step 400
400
#00B3D5
oklch(70.8% 0.127 217.9)
-
Step 500
500
#0099B7
oklch(63.1% 0.114 218.3)
-
Step 600
600
#00819A
oklch(55.7% 0.1 217.7)
-
Step 700
700
#006C82
oklch(49.1% 0.088 218.4)
-
Step 800
800
#00596B
oklch(42.8% 0.077 217.7)
-
Step 900
900
#004A5A
oklch(37.8% 0.068 218.5)
-
Step 950
950
#002C36
oklch(27% 0.048 217.4)
#31D4FA 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) | #BCCEFC | 0.116 |
| Deuteranopia (no green cones) | #A2BBFA | 0.104 |
| Tritanopia (no blue cones) | #00E1E0 | 0.060 |
| Achromatopsia (no color) | #C3C3C3 | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31D4FA
#31D4FA
oklch(80.6% 0.136 218.3)
- #FFA68A
#FFA68A
oklch(80.7% 0.113 38.2)
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 #31D4FA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bright Sky Blue #02CCFE ΔE 0.028
- Vivid Sky Blue #4CC9F0 ΔE 0.029
- Aqua Blue #02D8E9 ΔE 0.032
- Lightblue #7BC8F6 ΔE 0.051
- Sky #82CAFC ΔE 0.056
- Sky Blue #87CEEB ΔE 0.056
- Light Sky Blue #87CEFA ΔE 0.057
- Dark Turquoise #00CED1 ΔE 0.061
Use #31D4FA 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.