#31BFB8
Closest named color: Topaz (#13BBAF). oklch(73.1% 0.116 189.9), rgb(49, 191, 184).
Aa
Black text reads best on this color (9.27:1).
About this color
#31BFB8 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 73%, its chroma 0.116 and its hue 190°. Its hue sits on the cool side of the wheel. The nearest named color is Topaz (#13BBAF), ΔE 0.020 away. Black text reads best on it, at 9.27:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Topaz (#13BBAF) |
| Black text | 9.27:1 |
| White text | 2.26:1 |
Values
| HEX | #31BFB8 |
| RGB | rgb(49, 191, 184) |
| HSL | hsl(177, 59%, 47%) |
| OKLCH | oklch(73.1% 0.116 189.9) |
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 #31BFB8 | 2.26:1 | Fails | Lc -49.0 | Large or bold text, headings |
| Black text on #31BFB8 | 9.27:1 | AAA | Lc 59.8 | Large or bold text, headings |
| #31BFB8 text on white | 2.26:1 | Fails | Lc 44.2 | Non-text elements, placeholder text |
| #31BFB8 text on black | 9.27:1 | AAA | Lc -57.9 | 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
#DBEFED
oklch(93.7% 0.021 189.6)
-
Step 200
200
#BCE2DF
oklch(88.5% 0.04 190.6)
-
Step 300
300
#88D0CB
oklch(80.9% 0.072 190.3)
-
Step 400
400 (this color)
#31BFB8
oklch(73.1% 0.116 189.9)
-
Step 500
500
#009E98
oklch(63.1% 0.109 190)
-
Step 600
600
#008580
oklch(55.7% 0.096 190.1)
-
Step 700
700
#00706B
oklch(49.2% 0.085 189.4)
-
Step 800
800
#005C58
oklch(42.8% 0.074 189.6)
-
Step 900
900
#004C49
oklch(37.6% 0.065 190.2)
-
Step 950
950
#002E2B
oklch(27.1% 0.047 188)
#31BFB8 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) | #B4B5B8 | 0.123 |
| Deuteranopia (no green cones) | #A0A6B9 | 0.115 |
| Tritanopia (no blue cones) | #00C4BD | 0.015 |
| Achromatopsia (no color) | #ACACAC | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31BFB8
#31BFB8
oklch(73.1% 0.116 189.9)
- #E68897
#E68897
oklch(73% 0.116 10.1)
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 #31BFB8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Topaz #13BBAF ΔE 0.020
- Light Sea Green #20B2AA ΔE 0.040
- Dark Turquoise #00CED1 ΔE 0.046
- Greeny Blue #42B395 ΔE 0.051
- Turquoise Blue #06B1C4 ΔE 0.052
- Medium Turquoise #48D1CC ΔE 0.056
- Medium Aquamarine #66CDAA ΔE 0.062
- Green Blue #01C08D ΔE 0.066
Use #31BFB8 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.