#31A3BC
Closest named color: Turquoise Blue (#06B1C4). oklch(66.4% 0.104 215.9), rgb(49, 163, 188).
Aa
Black text reads best on this color (7.09:1).
About this color
#31A3BC is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 66%, its chroma 0.104 and its hue 216°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.038 away. Black text reads best on it, at 7.09:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 7.09:1 |
| White text | 2.95:1 |
Values
| HEX | #31A3BC |
| RGB | rgb(49, 163, 188) |
| HSL | hsl(191, 59%, 46%) |
| OKLCH | oklch(66.4% 0.104 215.9) |
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 #31A3BC | 2.95:1 | Fails | Lc -61.1 | Content text, not long reading |
| Black text on #31A3BC | 7.09:1 | AAA | Lc 48.3 | Large or bold text, headings |
| #31A3BC text on white | 2.95:1 | Fails | Lc 55.8 | Large or bold text, headings |
| #31A3BC text on black | 7.09:1 | AAA | Lc -46.0 | 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 500.
-
Step 50
50
#F1F7F8
oklch(97.2% 0.007 208.8)
-
Step 100
100
#DFEDF0
oklch(93.7% 0.015 212)
-
Step 200
200
#C5DEE5
oklch(88.4% 0.028 216.4)
-
Step 300
300
#9CCAD6
oklch(81% 0.051 215.5)
-
Step 400
400
#60AEC1
oklch(70.8% 0.082 215.4)
-
Step 500
500 (this color)
#31A3BC
oklch(66.4% 0.104 215.9)
-
Step 600
600
#008198
oklch(55.6% 0.099 216.1)
-
Step 700
700
#006D80
oklch(49.2% 0.087 215.3)
-
Step 800
800
#005969
oklch(42.7% 0.076 215.4)
-
Step 900
900
#004A58
oklch(37.7% 0.067 215.8)
-
Step 950
950
#062C34
oklch(27.2% 0.043 215.1)
#31A3BC 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) | #929EBD | 0.092 |
| Deuteranopia (no green cones) | #7F90BC | 0.083 |
| Tritanopia (no blue cones) | #00ACAB | 0.044 |
| Achromatopsia (no color) | #969696 | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31A3BC
#31A3BC
oklch(66.4% 0.104 215.9)
- #CB7B66
#CB7B66
oklch(66.4% 0.105 35.5)
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 #31A3BC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.038
- Cadet Blue #5F9EA0 ΔE 0.047
- Greyblue #77A1B5 ΔE 0.057
- Light Sea Green #20B2AA ΔE 0.059
- Sea #3C9992 ΔE 0.062
- Persian Green #2A9D8F ΔE 0.067
- Dull Teal #5F9E8F ΔE 0.068
- Teal Green #0A9396 ΔE 0.070
Use #31A3BC 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.