#309E75
Closest named color: Ocean Green (#3D9973). oklch(62.7% 0.117 164), rgb(48, 158, 117).
Aa
Black text reads best on this color (6.27:1).
About this color
#309E75 is a medium-light, moderately saturated green. In OKLCH its lightness is 63%, its chroma 0.117 and its hue 164°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Ocean Green (#3D9973), ΔE 0.015 away. Black text reads best on it, at 6.27:1.
| Hue family | Greens |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.117) |
| Temperature | in between |
| Nearest name | Ocean Green (#3D9973) |
| Black text | 6.27:1 |
| White text | 3.34:1 |
Values
| HEX | #309E75 |
| RGB | rgb(48, 158, 117) |
| HSL | hsl(158, 53%, 40%) |
| OKLCH | oklch(62.7% 0.117 164) |
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 #309E75 | 3.34:1 | AA large text | Lc -66.0 | Content text, not long reading |
| Black text on #309E75 | 6.27:1 | AA | Lc 43.5 | Non-text elements, placeholder text |
| #309E75 text on white | 3.34:1 | AA large text | Lc 60.6 | Content text, not long reading |
| #309E75 text on black | 6.27:1 | AA | Lc -41.1 | Non-text elements, placeholder text |
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
#F1F7F4
oklch(97.1% 0.007 164.9)
-
Step 100
100
#E0EEE7
oklch(93.7% 0.018 164.6)
-
Step 200
200
#C7E0D3
oklch(88.5% 0.032 163.2)
-
Step 300
300
#9FCDB7
oklch(80.9% 0.057 164.2)
-
Step 400
400
#67B391
oklch(70.8% 0.092 163.6)
-
Step 500
500 (this color)
#309E75
oklch(62.7% 0.117 164)
-
Step 600
600
#008860
oklch(55.5% 0.118 164)
-
Step 700
700
#007350
oklch(49.2% 0.105 163.6)
-
Step 800
800
#005E41
oklch(42.7% 0.091 163.9)
-
Step 900
900
#094E36
oklch(37.7% 0.077 163.5)
-
Step 950
950
#0A2E20
oklch(27.1% 0.049 163.7)
#309E75 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) | #9B9373 | 0.114 |
| Deuteranopia (no green cones) | #8D8878 | 0.111 |
| Tritanopia (no blue cones) | #009E93 | 0.044 |
| Achromatopsia (no color) | #8C8C8C | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #309E75
#309E75
oklch(62.7% 0.117 164)
- #B96A9A
#B96A9A
oklch(62.7% 0.117 343.8)
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 #309E75, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean Green #3D9973 ΔE 0.015
- Jade #1FA774 ΔE 0.028
- Persian Green #2A9D8F ΔE 0.039
- Blue Green #0F9B8E ΔE 0.041
- Viridian #1E9167 ΔE 0.042
- Light Forest Green #4F9153 ΔE 0.048
- Seaweed Green #35AD6B ΔE 0.052
- Sea #3C9992 ΔE 0.052
Use #309E75 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.