#1B4637
Closest named color: Evergreen (#05472A). oklch(35.9% 0.055 167.6), rgb(27, 70, 55).
Aa
White text reads best on this color (10.61:1).
About this color
#1B4637 is a dark, muted green. In OKLCH its lightness is 36%, its chroma 0.055 and its hue 168°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Evergreen (#05472A), ΔE 0.028 away. White text reads best on it, at 10.61:1.
| Hue family | Greens |
| Lightness | dark (36%) |
| Chroma | muted (0.055) |
| Temperature | in between |
| Nearest name | Evergreen (#05472A) |
| Black text | 1.97:1 |
| White text | 10.61:1 |
Values
| HEX | #1B4637 |
| RGB | rgb(27, 70, 55) |
| HSL | hsl(159, 44%, 19%) |
| OKLCH | oklch(35.9% 0.055 167.6) |
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 #1B4637 | 10.61:1 | AAA | Lc -98.4 | Preferred for body text |
| Black text on #1B4637 | 1.97:1 | Fails | Lc 9.5 | Not readable |
| #1B4637 text on white | 10.61:1 | AAA | Lc 94.5 | Preferred for body text |
| #1B4637 text on black | 1.97:1 | Fails | Lc -8.1 | 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
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E3ECE8
oklch(93.5% 0.011 167.8)
-
Step 200
200
#CCDED6
oklch(88.5% 0.022 167.4)
-
Step 300
300
#A8CABB
oklch(81% 0.042 166.8)
-
Step 400
400
#78AE98
oklch(70.7% 0.066 167.2)
-
Step 500
500
#519A7F
oklch(63.1% 0.085 167.5)
-
Step 600
600
#328469
oklch(55.5% 0.09 168.1)
-
Step 700
700
#237057
oklch(49.1% 0.085 167.6)
-
Step 800
800
#1F5B47
oklch(42.6% 0.071 167.7)
-
Step 900
900 (this color)
#1B4637
oklch(35.9% 0.055 167.6)
-
Step 950
950
#142C23
oklch(27% 0.035 167.4)
#1B4637 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) | #444136 | 0.055 |
| Deuteranopia (no green cones) | #3E3D38 | 0.053 |
| Tritanopia (no blue cones) | #074642 | 0.021 |
| Achromatopsia (no color) | #3E3E3E | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B4637
#1B4637
oklch(35.9% 0.055 167.6)
- #523142
#523142
oklch(36% 0.054 347.9)
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 #1B4637, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Evergreen #05472A ΔE 0.028
- Dark Teal #014D4E ΔE 0.038
- Dark Blue Green #005249 ΔE 0.041
- Pine Green #0A481E ΔE 0.044
- Charcoal Grey #3C4142 ΔE 0.052
- Charcoal #264653 ΔE 0.052
- Dark Slate Gray #2F4F4F ΔE 0.052
- Onyx #343A40 ΔE 0.056
Use #1B4637 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.