#1B5A4E
Closest named color: Dark Green Blue (#1F6357). oklch(42.4% 0.066 177.8), rgb(27, 90, 78).
Aa
White text reads best on this color (8.01:1).
About this color
#1B5A4E is a dark, muted teal or cyan. In OKLCH its lightness is 42%, its chroma 0.066 and its hue 178°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.030 away. White text reads best on it, at 8.01:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | muted (0.066) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 2.61:1 |
| White text | 8.01:1 |
Values
| HEX | #1B5A4E |
| RGB | rgb(27, 90, 78) |
| HSL | hsl(169, 54%, 23%) |
| OKLCH | oklch(42.4% 0.066 177.8) |
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 #1B5A4E | 8.01:1 | AAA | Lc -92.2 | Preferred for body text |
| Black text on #1B5A4E | 2.61:1 | Fails | Lc 16.5 | Dividers and decoration only |
| #1B5A4E text on white | 8.01:1 | AAA | Lc 87.5 | Fine for body text |
| #1B5A4E text on black | 2.61:1 | Fails | Lc -14.6 | 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
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E2ECEA
oklch(93.5% 0.011 182.9)
-
Step 200
200
#CBDED9
oklch(88.5% 0.021 178.3)
-
Step 300
300
#A7C9C0
oklch(80.8% 0.038 177.5)
-
Step 400
400
#76AEA0
oklch(70.8% 0.062 177)
-
Step 500
500
#4E9989
oklch(63% 0.079 177.9)
-
Step 600
600
#2D8473
oklch(55.7% 0.086 177.5)
-
Step 700
700
#1E6F60
oklch(49% 0.08 177.7)
-
Step 800
800 (this color)
#1B5A4E
oklch(42.4% 0.066 177.8)
-
Step 900
900
#1E4B41
oklch(37.8% 0.053 176.6)
-
Step 950
950
#132C26
oklch(27.1% 0.033 176.2)
#1B5A4E 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) | #56544D | 0.070 |
| Deuteranopia (no green cones) | #4D4E4F | 0.066 |
| Tritanopia (no blue cones) | #005B56 | 0.015 |
| Achromatopsia (no color) | #505050 | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B5A4E
#1B5A4E
oklch(42.4% 0.066 177.8)
- #6B3E4E
#6B3E4E
oklch(42.3% 0.066 357.5)
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 #1B5A4E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.030
- Dark Blue Green #005249 ΔE 0.031
- Deep Teal #00555A ΔE 0.032
- Dark Slate Gray #2F4F4F ΔE 0.039
- Petrol #005F6A ΔE 0.044
- Pine #2B5D34 ΔE 0.044
- Spruce #0A5F38 ΔE 0.045
- Dark Teal #014D4E ΔE 0.048
Use #1B5A4E 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.