#1B583C
Closest named color: Spruce (#0A5F38). oklch(41.3% 0.078 159.8), rgb(27, 88, 60).
Aa
White text reads best on this color (8.37:1).
About this color
#1B583C is a dark, moderately saturated green. In OKLCH its lightness is 41%, its chroma 0.078 and its hue 160°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Spruce (#0A5F38), ΔE 0.026 away. White text reads best on it, at 8.37:1.
| Hue family | Greens |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.078) |
| Temperature | in between |
| Nearest name | Spruce (#0A5F38) |
| Black text | 2.50:1 |
| White text | 8.37:1 |
Values
| HEX | #1B583C |
| RGB | rgb(27, 88, 60) |
| HSL | hsl(152, 53%, 23%) |
| OKLCH | oklch(41.3% 0.078 159.8) |
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 #1B583C | 8.37:1 | AAA | Lc -93.2 | Preferred for body text |
| Black text on #1B583C | 2.50:1 | Fails | Lc 15.4 | Dividers and decoration only |
| #1B583C text on white | 8.37:1 | AAA | Lc 88.6 | Fine for body text |
| #1B583C text on black | 2.50:1 | Fails | Lc -13.6 | 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
#CCDFD3
oklch(88.6% 0.026 158.1)
-
Step 300
300
#A8CAB6
oklch(80.8% 0.046 159.4)
-
Step 400
400
#78AF91
oklch(70.7% 0.073 159.9)
-
Step 500
500
#529B76
oklch(63.1% 0.093 160)
-
Step 600
600
#32855E
oklch(55.5% 0.101 159.8)
-
Step 700
700
#23714E
oklch(49.2% 0.095 160.1)
-
Step 800
800 (this color)
#1B583C
oklch(41.3% 0.078 159.8)
-
Step 900
900
#204B36
oklch(37.5% 0.061 160.2)
-
Step 950
950
#142C20
oklch(26.9% 0.038 160.6)
#1B583C 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) | #57513A | 0.074 |
| Deuteranopia (no green cones) | #4F4B3E | 0.073 |
| Tritanopia (no blue cones) | #005851 | 0.034 |
| Achromatopsia (no color) | #4E4E4E | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B583C
#1B583C
oklch(41.3% 0.078 159.8)
- #673959
#673959
oklch(41.3% 0.079 339.4)
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 #1B583C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Spruce #0A5F38 ΔE 0.026
- Pine #2B5D34 ΔE 0.027
- Dark Blue Green #005249 ΔE 0.036
- Dark Green Blue #1F6357 ΔE 0.048
- Navy Green #35530A ΔE 0.052
- Deep Teal #00555A ΔE 0.054
- Dark Slate Gray #2F4F4F ΔE 0.054
- Dark Teal #014D4E ΔE 0.057
Use #1B583C 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.