#284D40
Closest named color: Dark Blue Green (#005249). oklch(38.8% 0.049 169), rgb(40, 77, 64).
Aa
White text reads best on this color (9.43:1).
About this color
#284D40 is a dark, muted green. In OKLCH its lightness is 39%, its chroma 0.049 and its hue 169°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Blue Green (#005249), ΔE 0.026 away. White text reads best on it, at 9.43:1.
| Hue family | Greens |
| Lightness | dark (39%) |
| Chroma | muted (0.049) |
| Temperature | in between |
| Nearest name | Dark Blue Green (#005249) |
| Black text | 2.22:1 |
| White text | 9.43:1 |
Values
| HEX | #284D40 |
| RGB | rgb(40, 77, 64) |
| HSL | hsl(159, 32%, 23%) |
| OKLCH | oklch(38.8% 0.049 169) |
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 #284D40 | 9.43:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #284D40 | 2.22:1 | Fails | Lc 12.2 | Not readable |
| #284D40 text on white | 9.43:1 | AAA | Lc 91.7 | Preferred for body text |
| #284D40 text on black | 2.22:1 | Fails | Lc -10.7 | Not readable |
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 900.
-
Step 50
50
#F2F6F5
oklch(97% 0.004 179.7)
-
Step 100
100
#E3ECE8
oklch(93.5% 0.011 167.8)
-
Step 200
200
#CDDED7
oklch(88.6% 0.021 169.3)
-
Step 300
300
#ABC9BC
oklch(81% 0.037 167.4)
-
Step 400
400
#7DAD9A
oklch(70.8% 0.058 168.2)
-
Step 500
500
#599882
oklch(63.1% 0.074 169.5)
-
Step 600
600
#3C836B
oklch(55.7% 0.081 168.7)
-
Step 700
700
#2D6E59
oklch(49% 0.075 169.1)
-
Step 800
800
#275A49
oklch(42.7% 0.062 168.9)
-
Step 900
900 (this color)
#284D40
oklch(38.8% 0.049 169)
-
Step 950
950
#162B24
oklch(26.9% 0.03 170.6)
#284D40 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) | #4B493F | 0.049 |
| Deuteranopia (no green cones) | #454441 | 0.048 |
| Tritanopia (no blue cones) | #1C4D49 | 0.017 |
| Achromatopsia (no color) | #464646 | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284D40
#284D40
oklch(38.8% 0.049 169)
- #583A49
#583A49
oklch(38.8% 0.048 348.2)
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 #284D40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Green #005249 ΔE 0.026
- Dark Slate Gray #2F4F4F ΔE 0.027
- Dark Teal #014D4E ΔE 0.032
- Deep Teal #00555A ΔE 0.044
- Charcoal #264653 ΔE 0.046
- Charcoal Grey #3C4142 ΔE 0.047
- Evergreen #05472A ΔE 0.050
- Dark Grey Blue #29465B ΔE 0.059
Use #284D40 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.