#31BFBF
Closest named color: Topaz (#13BBAF). oklch(73.4% 0.115 194.9), rgb(49, 191, 191).
Aa
Black text reads best on this color (9.33:1).
About this color
#31BFBF is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 73%, its chroma 0.115 and its hue 195°. Its hue sits on the cool side of the wheel. The nearest named color is Topaz (#13BBAF), ΔE 0.027 away. Black text reads best on it, at 9.33:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Topaz (#13BBAF) |
| Black text | 9.33:1 |
| White text | 2.24:1 |
Values
| HEX | #31BFBF |
| RGB | rgb(49, 191, 191) |
| HSL | hsl(180, 59%, 47%) |
| OKLCH | oklch(73.4% 0.115 194.9) |
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 #31BFBF | 2.24:1 | Fails | Lc -48.7 | Large or bold text, headings |
| Black text on #31BFBF | 9.33:1 | AAA | Lc 60.0 | Content text, not long reading |
| #31BFBF text on white | 2.24:1 | Fails | Lc 43.9 | Non-text elements, placeholder text |
| #31BFBF text on black | 9.33:1 | AAA | Lc -58.2 | 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
#EFF8F7
oklch(97.2% 0.01 189.1)
-
Step 100
100
#DBEEEE
oklch(93.5% 0.02 196.8)
-
Step 200
200
#BCE2E1
oklch(88.5% 0.04 194.5)
-
Step 300
300
#88D0CF
oklch(81% 0.072 194.7)
-
Step 400
400 (this color)
#31BFBF
oklch(73.4% 0.115 194.9)
-
Step 500
500
#009D9D
oklch(63% 0.108 194.8)
-
Step 600
600
#008484
oklch(55.5% 0.095 194.8)
-
Step 700
700
#006F6F
oklch(49% 0.084 194.8)
-
Step 800
800
#005B5B
oklch(42.7% 0.073 194.8)
-
Step 900
900
#004C4C
oklch(37.7% 0.064 194.8)
-
Step 950
950
#002D2D
oklch(26.9% 0.046 194.8)
#31BFBF 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) | #B2B5BF | 0.120 |
| Deuteranopia (no green cones) | #9EA6C0 | 0.113 |
| Tritanopia (no blue cones) | #00C5BF | 0.019 |
| Achromatopsia (no color) | #ADADAD | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31BFBF
#31BFBF
oklch(73.4% 0.115 194.9)
- #E88A91
#E88A91
oklch(73.4% 0.115 15.5)
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 #31BFBF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Topaz #13BBAF ΔE 0.027
- Dark Turquoise #00CED1 ΔE 0.042
- Light Sea Green #20B2AA ΔE 0.044
- Turquoise Blue #06B1C4 ΔE 0.047
- Medium Turquoise #48D1CC ΔE 0.054
- Greeny Blue #42B395 ΔE 0.059
- Medium Aquamarine #66CDAA ΔE 0.067
- Vivid Sky Blue #4CC9F0 ΔE 0.075
Use #31BFBF 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.