#31B4BD
Closest named color: Turquoise Blue (#06B1C4). oklch(70.6% 0.109 201.9), rgb(49, 180, 189).
Aa
Black text reads best on this color (8.39:1).
About this color
#31B4BD is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 71%, its chroma 0.109 and its hue 202°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.019 away. Black text reads best on it, at 8.39:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 8.39:1 |
| White text | 2.50:1 |
Values
| HEX | #31B4BD |
| RGB | rgb(49, 180, 189) |
| HSL | hsl(184, 59%, 47%) |
| OKLCH | oklch(70.6% 0.109 201.9) |
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 #31B4BD | 2.50:1 | Fails | Lc -53.8 | Large or bold text, headings |
| Black text on #31B4BD | 8.39:1 | AAA | Lc 55.3 | Large or bold text, headings |
| #31B4BD text on white | 2.50:1 | Fails | Lc 48.7 | Large or bold text, headings |
| #31B4BD text on black | 8.39:1 | AAA | Lc -53.3 | 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
#BDE1E4
oklch(88.5% 0.038 202.7)
-
Step 300
300
#8BCED3
oklch(80.8% 0.068 201.8)
-
Step 400
400 (this color)
#31B4BD
oklch(70.6% 0.109 201.9)
-
Step 500
500
#009CA5
oklch(63.1% 0.107 202)
-
Step 600
600
#00838B
oklch(55.5% 0.095 202.3)
-
Step 700
700
#006E75
oklch(49% 0.083 202.5)
-
Step 800
800
#005A60
oklch(42.6% 0.073 202.7)
-
Step 900
900
#004B50
oklch(37.6% 0.064 202.5)
-
Step 950
950
#002D30
oklch(27% 0.046 201.8)
#31B4BD 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) | #A6ACBE | 0.110 |
| Deuteranopia (no green cones) | #929EBE | 0.101 |
| Tritanopia (no blue cones) | #00BBB6 | 0.027 |
| Achromatopsia (no color) | #A4A4A4 | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31B4BD
#31B4BD
oklch(70.6% 0.109 201.9)
- #DC8481
#DC8481
oklch(70.6% 0.109 22.3)
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 #31B4BD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.019
- Light Sea Green #20B2AA ΔE 0.030
- Topaz #13BBAF ΔE 0.035
- Greeny Blue #42B395 ΔE 0.058
- Cadet Blue #5F9EA0 ΔE 0.065
- Greyblue #77A1B5 ΔE 0.068
- Dark Turquoise #00CED1 ΔE 0.071
- Bluegrey #85A3B2 ΔE 0.076
Use #31B4BD 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.