#306E57
Closest named color: Dark Aquamarine (#017371). oklch(49% 0.075 166.4), rgb(48, 110, 87).
Aa
White text reads best on this color (6.01:1).
About this color
#306E57 is a medium-dark, moderately saturated green. In OKLCH its lightness is 49%, its chroma 0.075 and its hue 166°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Aquamarine (#017371), ΔE 0.040 away. White text reads best on it, at 6.01:1.
| Hue family | Greens |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.075) |
| Temperature | in between |
| Nearest name | Dark Aquamarine (#017371) |
| Black text | 3.49:1 |
| White text | 6.01:1 |
Values
| HEX | #306E57 |
| RGB | rgb(48, 110, 87) |
| HSL | hsl(158, 39%, 31%) |
| OKLCH | oklch(49% 0.075 166.4) |
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 #306E57 | 6.01:1 | AA | Lc -85.1 | Fine for body text |
| Black text on #306E57 | 3.49:1 | AA large text | Lc 24.2 | Dividers and decoration only |
| #306E57 text on white | 6.01:1 | AA | Lc 79.9 | Fine for body text |
| #306E57 text on black | 3.49:1 | AA large text | Lc -22.0 | Dividers and decoration only |
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 700.
-
Step 50
50
#F3F6F5
oklch(97.1% 0.003 174.5)
-
Step 100
100
#E4ECE8
oklch(93.6% 0.01 164.9)
-
Step 200
200
#CDDED6
oklch(88.6% 0.021 166)
-
Step 300
300
#ABC8BB
oklch(80.8% 0.036 166.6)
-
Step 400
400
#7EAD99
oklch(70.8% 0.058 166.6)
-
Step 500
500
#5B9880
oklch(63.1% 0.074 167)
-
Step 600
600
#3F8269
oklch(55.5% 0.08 166.8)
-
Step 700
700 (this color)
#306E57
oklch(49% 0.075 166.4)
-
Step 800
800
#295A47
oklch(42.7% 0.063 165.9)
-
Step 900
900
#264A3C
oklch(37.7% 0.049 166.7)
-
Step 950
950
#172B23
oklch(26.9% 0.03 166.8)
#306E57 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) | #6C6756 | 0.075 |
| Deuteranopia (no green cones) | #626058 | 0.072 |
| Tritanopia (no blue cones) | #166E67 | 0.028 |
| Achromatopsia (no color) | #636363 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #306E57
#306E57
oklch(49% 0.075 166.4)
- #7F4F69
#7F4F69
oklch(49% 0.074 346.5)
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 #306E57, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aquamarine #017371 ΔE 0.040
- Dark Green Blue #1F6357 ΔE 0.040
- Deep Turquoise #017374 ΔE 0.044
- Dark Aqua #05696B ΔE 0.045
- Bluegreen #017A79 ΔE 0.054
- Dark Olive Green #556B2F ΔE 0.058
- Deep Aqua #08787F ΔE 0.060
- Dark Moss Green #606C38 ΔE 0.062
Use #306E57 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.