#31B474
Closest named color: Medium Sea Green (#3CB371). oklch(68.5% 0.147 157), rgb(49, 180, 116).
Aa
Black text reads best on this color (7.91:1).
About this color
#31B474 is a medium-light, vivid green. In OKLCH its lightness is 68%, its chroma 0.147 and its hue 157°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Medium Sea Green (#3CB371), ΔE 0.006 away. Black text reads best on it, at 7.91:1.
| Hue family | Greens |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.147) |
| Temperature | in between |
| Nearest name | Medium Sea Green (#3CB371) |
| Black text | 7.91:1 |
| White text | 2.65:1 |
Values
| HEX | #31B474 |
| RGB | rgb(49, 180, 116) |
| HSL | hsl(151, 57%, 45%) |
| OKLCH | oklch(68.5% 0.147 157) |
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 #31B474 | 2.65:1 | Fails | Lc -56.4 | Large or bold text, headings |
| Black text on #31B474 | 7.91:1 | AAA | Lc 52.8 | Large or bold text, headings |
| #31B474 text on white | 2.65:1 | Fails | Lc 51.2 | Large or bold text, headings |
| #31B474 text on black | 7.91:1 | AAA | Lc -50.7 | 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
#EFF8F2
oklch(97.1% 0.012 157)
-
Step 100
100
#DCF0E3
oklch(93.7% 0.027 157.4)
-
Step 200
200
#BFE4CC
oklch(88.6% 0.051 156.8)
-
Step 300
300
#8ED3A9
oklch(80.9% 0.092 156.9)
-
Step 400
400 (this color)
#31B474
oklch(68.5% 0.147 157)
-
Step 500
500
#00A363
oklch(63% 0.15 157)
-
Step 600
600
#008A53
oklch(55.7% 0.133 157)
-
Step 700
700
#007445
oklch(49.2% 0.117 157)
-
Step 800
800
#005F37
oklch(42.7% 0.102 156.7)
-
Step 900
900
#004F2D
oklch(37.6% 0.09 156.8)
-
Step 950
950
#002F19
oklch(26.9% 0.064 157.1)
#31B474 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) | #B3A670 | 0.134 |
| Deuteranopia (no green cones) | #A39A78 | 0.131 |
| Tritanopia (no blue cones) | #00B3A4 | 0.068 |
| Achromatopsia (no color) | #9F9F9F | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31B474
#31B474
oklch(68.5% 0.147 157)
- #D273BA
#D273BA
oklch(68.5% 0.147 337.3)
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 #31B474, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Sea Green #3CB371 ΔE 0.006
- Dark Seafoam #1FB57A ΔE 0.008
- Green Teal #0CB577 ΔE 0.010
- Bluey Green #2BB179 ΔE 0.013
- Dark Seafoam Green #3EAF76 ΔE 0.017
- Jade Green #2BAF6A ΔE 0.018
- Seaweed Green #35AD6B ΔE 0.020
- Cool Green #33B864 ΔE 0.026
Use #31B474 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.