#1B4F37
Closest named color: Dark Blue Green (#005249). oklch(38.5% 0.069 160.3), rgb(27, 79, 55).
Aa
White text reads best on this color (9.45:1).
About this color
#1B4F37 is a dark, muted green. In OKLCH its lightness is 39%, its chroma 0.069 and its hue 160°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Blue Green (#005249), ΔE 0.028 away. White text reads best on it, at 9.45:1.
| Hue family | Greens |
| Lightness | dark (39%) |
| Chroma | muted (0.069) |
| Temperature | in between |
| Nearest name | Dark Blue Green (#005249) |
| Black text | 2.22:1 |
| White text | 9.45:1 |
Values
| HEX | #1B4F37 |
| RGB | rgb(27, 79, 55) |
| HSL | hsl(152, 49%, 21%) |
| OKLCH | oklch(38.5% 0.069 160.3) |
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 #1B4F37 | 9.45:1 | AAA | Lc -95.9 | Preferred for body text |
| Black text on #1B4F37 | 2.22:1 | Fails | Lc 12.3 | Not readable |
| #1B4F37 text on white | 9.45:1 | AAA | Lc 91.7 | Preferred for body text |
| #1B4F37 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
#F2F7F4
oklch(97.2% 0.007 160.1)
-
Step 100
100
#E2EDE6
oklch(93.6% 0.015 158.2)
-
Step 200
200
#CADFD3
oklch(88.5% 0.028 160.8)
-
Step 300
300
#A4CBB5
oklch(80.8% 0.052 160.3)
-
Step 400
400
#71B18F
oklch(70.7% 0.083 160.1)
-
Step 500
500
#469D73
oklch(63.1% 0.106 160.1)
-
Step 600
600
#1D885C
oklch(55.7% 0.116 160.3)
-
Step 700
700
#0A734B
oklch(49.1% 0.108 160)
-
Step 800
800
#115E3E
oklch(42.8% 0.09 160.1)
-
Step 900
900 (this color)
#1B4F37
oklch(38.5% 0.069 160.3)
-
Step 950
950
#102D1F
oklch(27% 0.044 160.3)
#1B4F37 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) | #4E4936 | 0.066 |
| Deuteranopia (no green cones) | #474439 | 0.064 |
| Tritanopia (no blue cones) | #034F49 | 0.030 |
| Achromatopsia (no color) | #464646 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B4F37
#1B4F37
oklch(38.5% 0.069 160.3)
- #5C344F
#5C344F
oklch(38.4% 0.069 340.2)
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 #1B4F37, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Green #005249 ΔE 0.028
- Evergreen #05472A ΔE 0.035
- Dark Teal #014D4E ΔE 0.042
- Pine Green #0A481E ΔE 0.043
- Dark Slate Gray #2F4F4F ΔE 0.048
- Pine #2B5D34 ΔE 0.052
- Spruce #0A5F38 ΔE 0.053
- Deep Teal #00555A ΔE 0.055
Use #1B4F37 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.