#1D4E57
Closest named color: Dark Slate Gray (#2F4F4F). oklch(39.5% 0.054 211.6), rgb(29, 78, 87).
Aa
White text reads best on this color (9.21:1).
About this color
#1D4E57 is a dark, muted teal or cyan. In OKLCH its lightness is 39%, its chroma 0.054 and its hue 212°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.022 away. White text reads best on it, at 9.21:1.
| Hue family | Teals and cyans |
| Lightness | dark (39%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.27:1 |
| White text | 9.21:1 |
Values
| HEX | #1D4E57 |
| RGB | rgb(29, 78, 87) |
| HSL | hsl(189, 50%, 23%) |
| OKLCH | oklch(39.5% 0.054 211.6) |
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 #1D4E57 | 9.21:1 | AAA | Lc -95.4 | Preferred for body text |
| Black text on #1D4E57 | 2.27:1 | Fails | Lc 12.9 | Not readable |
| #1D4E57 text on white | 9.21:1 | AAA | Lc 91.0 | Preferred for body text |
| #1D4E57 text on black | 2.27:1 | Fails | Lc -11.3 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E1ECEE
oklch(93.5% 0.012 209.8)
-
Step 200
200
#C9DDE2
oklch(88.4% 0.022 214.4)
-
Step 300
300
#A3C8D0
oklch(80.9% 0.041 212.3)
-
Step 400
400
#6FACB8
oklch(70.7% 0.065 211.4)
-
Step 500
500
#4497A6
oklch(63.1% 0.083 211.1)
-
Step 600
600
#1B8192
oklch(55.6% 0.09 212)
-
Step 700
700
#076D7C
oklch(49.1% 0.084 211.5)
-
Step 800
800
#0F5965
oklch(42.8% 0.069 211.6)
-
Step 900
900 (this color)
#1D4E57
oklch(39.5% 0.054 211.6)
-
Step 950
950
#102B30
oklch(27% 0.034 211.3)
#1D4E57 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) | #474B58 | 0.051 |
| Deuteranopia (no green cones) | #3E4557 | 0.045 |
| Tritanopia (no blue cones) | #005251 | 0.024 |
| Achromatopsia (no color) | #484848 | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D4E57
#1D4E57
oklch(39.5% 0.054 211.6)
- #603B34
#603B34
oklch(39.4% 0.054 31.3)
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 #1D4E57, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.022
- Dark Teal #014D4E ΔE 0.023
- Deep Teal #00555A ΔE 0.024
- Charcoal #264653 ΔE 0.025
- Dark Grey Blue #29465B ΔE 0.030
- Dark Blue Green #005249 ΔE 0.035
- Charcoal Grey #3C4142 ΔE 0.053
- Petrol #005F6A ΔE 0.054
Use #1D4E57 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.