#18583B
Closest named color: Spruce (#0A5F38). oklch(41.2% 0.081 159.6), rgb(24, 88, 59).
Aa
White text reads best on this color (8.40:1).
About this color
#18583B is a dark, moderately saturated green. In OKLCH its lightness is 41%, its chroma 0.081 and its hue 160°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Spruce (#0A5F38), ΔE 0.025 away. White text reads best on it, at 8.40:1.
| Hue family | Greens |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.081) |
| Temperature | in between |
| Nearest name | Spruce (#0A5F38) |
| Black text | 2.49:1 |
| White text | 8.40:1 |
Values
| HEX | #18583B |
| RGB | rgb(24, 88, 59) |
| HSL | hsl(153, 57%, 22%) |
| OKLCH | oklch(41.2% 0.081 159.6) |
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 #18583B | 8.40:1 | AAA | Lc -93.3 | Preferred for body text |
| Black text on #18583B | 2.49:1 | Fails | Lc 15.3 | Dividers and decoration only |
| #18583B text on white | 8.40:1 | AAA | Lc 88.7 | Fine for body text |
| #18583B text on black | 2.49:1 | Fails | Lc -13.5 | 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 800.
-
Step 50
50
#F2F7F4
oklch(97.2% 0.007 160.1)
-
Step 100
100
#E3EDE7
oklch(93.7% 0.013 159.9)
-
Step 200
200
#CBDFD3
oklch(88.5% 0.027 159.5)
-
Step 300
300
#A7CAB6
oklch(80.8% 0.047 160.1)
-
Step 400
400
#76AF90
oklch(70.6% 0.075 159.9)
-
Step 500
500
#4F9B75
oklch(63% 0.096 160.1)
-
Step 600
600
#2F865D
oklch(55.7% 0.105 159.4)
-
Step 700
700
#20714D
oklch(49% 0.097 159.9)
-
Step 800
800 (this color)
#18583B
oklch(41.2% 0.081 159.6)
-
Step 900
900
#1F4C36
oklch(37.8% 0.063 159.9)
-
Step 950
950
#132C1F
oklch(26.8% 0.04 159.4)
#18583B 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) | #575139 | 0.076 |
| Deuteranopia (no green cones) | #4F4B3D | 0.074 |
| Tritanopia (no blue cones) | #005850 | 0.034 |
| Achromatopsia (no color) | #4D4D4D | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18583B
#18583B
oklch(41.2% 0.081 159.6)
- #673859
#673859
oklch(41.1% 0.081 339.2)
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 #18583B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Spruce #0A5F38 ΔE 0.025
- Pine #2B5D34 ΔE 0.027
- Dark Blue Green #005249 ΔE 0.036
- Dark Green Blue #1F6357 ΔE 0.050
- Navy Green #35530A ΔE 0.051
- Deep Teal #00555A ΔE 0.055
- Dark Slate Gray #2F4F4F ΔE 0.056
- Deep Green #02590F ΔE 0.056
Use #18583B 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.