#1D4E58
Closest named color: Dark Slate Gray (#2F4F4F). oklch(39.5% 0.055 213.3), rgb(29, 78, 88).
Aa
White text reads best on this color (9.19:1).
About this color
#1D4E58 is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.055 and its hue 213°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.023 away. White text reads best on it, at 9.19:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.28:1 |
| White text | 9.19:1 |
Values
| HEX | #1D4E58 |
| RGB | rgb(29, 78, 88) |
| HSL | hsl(190, 50%, 23%) |
| OKLCH | oklch(39.5% 0.055 213.3) |
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 #1D4E58 | 9.19:1 | AAA | Lc -95.4 | Preferred for body text |
| Black text on #1D4E58 | 2.28:1 | Fails | Lc 13.0 | Not readable |
| #1D4E58 text on white | 9.19:1 | AAA | Lc 91.0 | Preferred for body text |
| #1D4E58 text on black | 2.28:1 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E1ECEF
oklch(93.6% 0.012 215.8)
-
Step 200
200
#C9DDE2
oklch(88.4% 0.022 214.4)
-
Step 300
300
#A3C8D1
oklch(80.9% 0.041 214.2)
-
Step 400
400
#6FACB9
oklch(70.8% 0.066 212.6)
-
Step 500
500
#4497A8
oklch(63.2% 0.084 213.1)
-
Step 600
600
#1B8193
oklch(55.7% 0.091 212.9)
-
Step 700
700
#066D7D
oklch(49.2% 0.084 212.5)
-
Step 800
800
#0F5966
oklch(42.8% 0.07 212.9)
-
Step 900
900 (this color)
#1D4E58
oklch(39.5% 0.055 213.3)
-
Step 950
950
#102B31
oklch(27.1% 0.034 214.3)
#1D4E58 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) | #464B59 | 0.049 |
| Deuteranopia (no green cones) | #3E4558 | 0.045 |
| Tritanopia (no blue cones) | #005251 | 0.025 |
| Achromatopsia (no color) | #484848 | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D4E58
#1D4E58
oklch(39.5% 0.055 213.3)
- #603B33
#603B33
oklch(39.4% 0.055 32.8)
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 #1D4E58, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.023
- Deep Teal #00555A ΔE 0.024
- Dark Teal #014D4E ΔE 0.025
- Charcoal #264653 ΔE 0.025
- Dark Grey Blue #29465B ΔE 0.029
- Dark Blue Green #005249 ΔE 0.037
- Charcoal Grey #3C4142 ΔE 0.053
- Petrol #005F6A ΔE 0.054
Use #1D4E58 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.