#1D4E55
Closest named color: Dark Slate Gray (#2F4F4F). oklch(39.4% 0.053 208.1), rgb(29, 78, 85).
Aa
White text reads best on this color (9.23:1).
About this color
#1D4E55 is a dark, muted teal or cyan. In OKLCH its lightness is 39%, its chroma 0.053 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.020 away. White text reads best on it, at 9.23:1.
| Hue family | Teals and cyans |
| Lightness | dark (39%) |
| Chroma | muted (0.053) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.27:1 |
| White text | 9.23:1 |
Values
| HEX | #1D4E55 |
| RGB | rgb(29, 78, 85) |
| HSL | hsl(188, 49%, 22%) |
| OKLCH | oklch(39.4% 0.053 208.1) |
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 #1D4E55 | 9.23:1 | AAA | Lc -95.5 | Preferred for body text |
| Black text on #1D4E55 | 2.27:1 | Fails | Lc 12.9 | Not readable |
| #1D4E55 text on white | 9.23:1 | AAA | Lc 91.1 | Preferred for body text |
| #1D4E55 text on black | 2.27:1 | Fails | Lc -11.2 | 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
#E2ECEE
oklch(93.6% 0.011 211)
-
Step 200
200
#C9DEE1
oklch(88.6% 0.023 207.1)
-
Step 300
300
#A4C8CE
oklch(80.9% 0.039 208.8)
-
Step 400
400
#70ACB5
oklch(70.7% 0.063 207.8)
-
Step 500
500
#4497A3
oklch(63% 0.082 208.1)
-
Step 600
600
#1C818E
oklch(55.5% 0.088 208.2)
-
Step 700
700
#086D79
oklch(49% 0.082 208.4)
-
Step 800
800
#105963
oklch(42.7% 0.068 209)
-
Step 900
900 (this color)
#1D4E55
oklch(39.4% 0.053 208.1)
-
Step 950
950
#102B2F
oklch(27% 0.033 208.2)
#1D4E55 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) | #474B55 | 0.051 |
| Deuteranopia (no green cones) | #3F4555 | 0.047 |
| Tritanopia (no blue cones) | #005250 | 0.023 |
| Achromatopsia (no color) | #474747 | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D4E55
#1D4E55
oklch(39.4% 0.053 208.1)
- #603B36
#603B36
oklch(39.5% 0.054 28.1)
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 #1D4E55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.020
- Dark Teal #014D4E ΔE 0.021
- Deep Teal #00555A ΔE 0.023
- Charcoal #264653 ΔE 0.026
- Dark Blue Green #005249 ΔE 0.032
- Dark Grey Blue #29465B ΔE 0.032
- Charcoal Grey #3C4142 ΔE 0.052
- Petrol #005F6A ΔE 0.055
Use #1D4E55 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.