#31C2EF
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(76% 0.132 224.3), rgb(49, 194, 239).
Aa
Black text reads best on this color (10.09:1).
About this color
#31C2EF is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 76%, its chroma 0.132 and its hue 224°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.026 away. Black text reads best on it, at 10.09:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (76%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 10.09:1 |
| White text | 2.08:1 |
Values
| HEX | #31C2EF |
| RGB | rgb(49, 194, 239) |
| HSL | hsl(194, 86%, 56%) |
| OKLCH | oklch(76% 0.132 224.3) |
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 #31C2EF | 2.08:1 | Fails | Lc -44.8 | Non-text elements, placeholder text |
| Black text on #31C2EF | 10.09:1 | AAA | Lc 63.7 | Content text, not long reading |
| #31C2EF text on white | 2.08:1 | Fails | Lc 40.2 | Non-text elements, placeholder text |
| #31C2EF text on black | 10.09:1 | AAA | Lc -62.1 | 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
#EAF8FE
oklch(97% 0.017 225.2)
-
Step 100
100
#D0F0FD
oklch(93.6% 0.038 224.3)
-
Step 200
200
#A4E4FD
oklch(88.4% 0.073 224.2)
-
Step 300
300 (this color)
#31C2EF
oklch(76% 0.132 224.3)
-
Step 400
400
#00B1DE
oklch(70.7% 0.133 224.4)
-
Step 500
500
#0098BF
oklch(63.2% 0.119 224.4)
-
Step 600
600
#0080A1
oklch(55.7% 0.105 224.1)
-
Step 700
700
#006B88
oklch(49.1% 0.093 224.9)
-
Step 800
800
#005870
oklch(42.8% 0.081 224.4)
-
Step 900
900
#00495D
oklch(37.7% 0.071 223.8)
-
Step 950
950
#002B39
oklch(26.9% 0.051 225.5)
#31C2EF 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) | #A9BEF1 | 0.102 |
| Deuteranopia (no green cones) | #90ACEF | 0.089 |
| Tritanopia (no blue cones) | #00CFD1 | 0.066 |
| Achromatopsia (no color) | #B4B4B4 | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31C2EF
#31C2EF
oklch(76% 0.132 224.3)
- #F69468
#F69468
oklch(76% 0.132 44.5)
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 #31C2EF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.026
- Deep Sky Blue #00BFFF ΔE 0.028
- Bright Sky Blue #02CCFE ΔE 0.030
- Lightblue #7BC8F6 ΔE 0.057
- Dark Turquoise #00CED1 ΔE 0.064
- Aqua Blue #02D8E9 ΔE 0.064
- Sky #82CAFC ΔE 0.067
- Turquoise Blue #06B1C4 ΔE 0.074
Use #31C2EF 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.