#31B4BB
Closest named color: Turquoise Blue (#06B1C4). oklch(70.5% 0.109 200.4), rgb(49, 180, 187).
Aa
Black text reads best on this color (8.37:1).
About this color
#31B4BB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 71%, its chroma 0.109 and its hue 200°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.021 away. Black text reads best on it, at 8.37:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 8.37:1 |
| White text | 2.50:1 |
Values
| HEX | #31B4BB |
| RGB | rgb(49, 180, 187) |
| HSL | hsl(183, 58%, 46%) |
| OKLCH | oklch(70.5% 0.109 200.4) |
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 #31B4BB | 2.50:1 | Fails | Lc -53.9 | Large or bold text, headings |
| Black text on #31B4BB | 8.37:1 | AAA | Lc 55.2 | Large or bold text, headings |
| #31B4BB text on white | 2.50:1 | Fails | Lc 48.8 | Large or bold text, headings |
| #31B4BB text on black | 8.37:1 | AAA | Lc -53.2 | 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
#EFF7F8
oklch(97% 0.009 205.9)
-
Step 100
100
#DCEEEF
oklch(93.6% 0.019 200.9)
-
Step 200
200
#BDE1E3
oklch(88.5% 0.038 200.6)
-
Step 300
300
#8BCED2
oklch(80.8% 0.068 200.7)
-
Step 400
400 (this color)
#31B4BB
oklch(70.5% 0.109 200.4)
-
Step 500
500
#009CA3
oklch(63% 0.107 200.4)
-
Step 600
600
#008389
oklch(55.5% 0.094 200.5)
-
Step 700
700
#006F74
oklch(49.2% 0.084 200.3)
-
Step 800
800
#005B5F
oklch(42.8% 0.073 200)
-
Step 900
900
#004B4F
oklch(37.5% 0.064 200.9)
-
Step 950
950
#002D2F
oklch(27% 0.046 199.4)
#31B4BB 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) | #A6ACBC | 0.110 |
| Deuteranopia (no green cones) | #939DBC | 0.103 |
| Tritanopia (no blue cones) | #00BBB6 | 0.025 |
| Achromatopsia (no color) | #A4A4A4 | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31B4BB
#31B4BB
oklch(70.5% 0.109 200.4)
- #DB8483
#DB8483
oklch(70.5% 0.108 20.8)
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 #31B4BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.021
- Light Sea Green #20B2AA ΔE 0.027
- Topaz #13BBAF ΔE 0.032
- Greeny Blue #42B395 ΔE 0.055
- Cadet Blue #5F9EA0 ΔE 0.065
- Greyblue #77A1B5 ΔE 0.069
- Dark Turquoise #00CED1 ΔE 0.071
- Dull Teal #5F9E8F ΔE 0.075
Use #31B4BB 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.