#31B4E2
Closest named color: Deep Sky Blue (#00BFFF). oklch(72.1% 0.127 227), rgb(49, 180, 226).
Aa
Black text reads best on this color (8.75:1).
About this color
#31B4E2 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 72%, its chroma 0.127 and its hue 227°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.045 away. Black text reads best on it, at 8.75:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 8.75:1 |
| White text | 2.39:1 |
Values
| HEX | #31B4E2 |
| RGB | rgb(49, 180, 226) |
| HSL | hsl(196, 75%, 54%) |
| OKLCH | oklch(72.1% 0.127 227) |
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 #31B4E2 | 2.39:1 | Fails | Lc -51.8 | Large or bold text, headings |
| Black text on #31B4E2 | 8.75:1 | AAA | Lc 57.2 | Large or bold text, headings |
| #31B4E2 text on white | 2.39:1 | Fails | Lc 46.8 | Large or bold text, headings |
| #31B4E2 text on black | 8.75:1 | AAA | Lc -55.2 | 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
#EEF7FB
oklch(97.1% 0.011 226)
-
Step 100
100
#DBEDF6
oklch(93.5% 0.023 229.1)
-
Step 200
200
#BCE0F0
oklch(88.6% 0.044 226.6)
-
Step 300
300
#88CBE8
oklch(80.8% 0.079 227.1)
-
Step 400
400 (this color)
#31B4E2
oklch(72.1% 0.127 227)
-
Step 500
500
#0097C2
oklch(63.1% 0.122 226.9)
-
Step 600
600
#007FA4
oklch(55.6% 0.108 227.1)
-
Step 700
700
#006B8A
oklch(49.2% 0.095 226.5)
-
Step 800
800
#005772
oklch(42.6% 0.083 227.6)
-
Step 900
900
#00495F
oklch(37.8% 0.072 226.2)
-
Step 950
950
#002B3A
oklch(27% 0.052 227.2)
#31B4E2 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) | #9BB1E4 | 0.093 |
| Deuteranopia (no green cones) | #84A0E1 | 0.081 |
| Tritanopia (no blue cones) | #00C1C3 | 0.068 |
| Achromatopsia (no color) | #A7A7A7 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31B4E2
#31B4E2
oklch(72.1% 0.127 227)
- #E58A5C
#E58A5C
oklch(72% 0.127 46.8)
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 #31B4E2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.045
- Turquoise Blue #06B1C4 ΔE 0.047
- Vivid Sky Blue #4CC9F0 ΔE 0.062
- Bright Sky Blue #02CCFE ΔE 0.068
- Greyblue #77A1B5 ΔE 0.081
- Dark Turquoise #00CED1 ΔE 0.085
- Light Sea Green #20B2AA ΔE 0.085
- Lightblue #7BC8F6 ΔE 0.085
Use #31B4E2 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.