#309A63
Closest named color: Ocean Green (#3D9973). oklch(61.2% 0.128 156.3), rgb(48, 154, 99).
Aa
Black text reads best on this color (5.92:1).
About this color
#309A63 is a medium-dark, moderately saturated green. In OKLCH its lightness is 61%, its chroma 0.128 and its hue 156°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Ocean Green (#3D9973), ΔE 0.026 away. Black text reads best on it, at 5.92:1.
| Hue family | Greens |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.128) |
| Temperature | in between |
| Nearest name | Ocean Green (#3D9973) |
| Black text | 5.92:1 |
| White text | 3.54:1 |
Values
| HEX | #309A63 |
| RGB | rgb(48, 154, 99) |
| HSL | hsl(149, 52%, 40%) |
| OKLCH | oklch(61.2% 0.128 156.3) |
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 #309A63 | 3.54:1 | AA large text | Lc -68.1 | Content text, not long reading |
| Black text on #309A63 | 5.92:1 | AA | Lc 41.4 | Non-text elements, placeholder text |
| #309A63 text on white | 3.54:1 | AA large text | Lc 62.6 | Content text, not long reading |
| #309A63 text on black | 5.92:1 | AA | Lc -39.0 | 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
#F1F7F3
oklch(97.1% 0.008 157.1)
-
Step 100
100
#E1EEE5
oklch(93.7% 0.018 155.8)
-
Step 200
200
#C8E0D0
oklch(88.4% 0.034 156.5)
-
Step 300
300
#A0CDB0
oklch(80.8% 0.063 156.5)
-
Step 400
400
#69B387
oklch(70.6% 0.099 156.6)
-
Step 500
500 (this color)
#309A63
oklch(61.2% 0.128 156.3)
-
Step 600
600
#008A51
oklch(55.7% 0.135 156.2)
-
Step 700
700
#007443
oklch(49.1% 0.119 156.1)
-
Step 800
800
#005F36
oklch(42.7% 0.103 156.1)
-
Step 900
900
#0E4E2E
oklch(37.6% 0.083 156.1)
-
Step 950
950
#0C2E1B
oklch(27% 0.053 155.6)
#309A63 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) | #998E5F | 0.115 |
| Deuteranopia (no green cones) | #8C8467 | 0.114 |
| Tritanopia (no blue cones) | #00998C | 0.060 |
| Achromatopsia (no color) | #888888 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #309A63
#309A63
oklch(61.2% 0.128 156.3)
- #B364A0
#B364A0
oklch(61.3% 0.127 336.7)
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 #309A63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean Green #3D9973 ΔE 0.026
- Light Forest Green #4F9153 ΔE 0.031
- Viridian #1E9167 ΔE 0.032
- Jade #1FA774 ΔE 0.038
- Sea Green #2E8B57 ΔE 0.045
- Fern Green #548D44 ΔE 0.046
- Muted Green #5FA052 ΔE 0.047
- Flat Green #699D4C ΔE 0.054
Use #309A63 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.