#1B424D
Closest named color: Charcoal (#264653). oklch(35.6% 0.048 219), rgb(27, 66, 77).
Aa
White text reads best on this color (10.86:1).
About this color
#1B424D is a dark, muted teal or cyan. In OKLCH its lightness is 36%, its chroma 0.048 and its hue 219°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal (#264653), ΔE 0.020 away. White text reads best on it, at 10.86:1.
| Hue family | Teals and cyans |
| Lightness | dark (36%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Charcoal (#264653) |
| Black text | 1.93:1 |
| White text | 10.86:1 |
Values
| HEX | #1B424D |
| RGB | rgb(27, 66, 77) |
| HSL | hsl(193, 48%, 20%) |
| OKLCH | oklch(35.6% 0.048 219) |
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 #1B424D | 10.86:1 | AAA | Lc -98.9 | Preferred for body text |
| Black text on #1B424D | 1.93:1 | Fails | Lc 8.9 | Not readable |
| #1B424D text on white | 10.86:1 | AAA | Lc 95.0 | Preferred for body text |
| #1B424D text on black | 1.93:1 | Fails | Lc -7.6 | 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 900.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3ECEE
oklch(93.7% 0.01 212.5)
-
Step 200
200
#CBDDE2
oklch(88.6% 0.021 216.2)
-
Step 300
300
#A8C7D0
oklch(81% 0.036 217.2)
-
Step 400
400
#78AAB9
oklch(70.8% 0.057 218.4)
-
Step 500
500
#5294A8
oklch(63.1% 0.074 219.7)
-
Step 600
600
#337E93
oklch(55.5% 0.08 219.4)
-
Step 700
700
#256A7D
oklch(49% 0.074 219.6)
-
Step 800
800
#215766
oklch(42.8% 0.061 219.2)
-
Step 900
900 (this color)
#1B424D
oklch(35.6% 0.048 219)
-
Step 950
950
#142A30
oklch(27% 0.03 217.4)
#1B424D 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) | #3B404E | 0.041 |
| Deuteranopia (no green cones) | #343B4D | 0.036 |
| Tritanopia (no blue cones) | #004645 | 0.028 |
| Achromatopsia (no color) | #3D3D3D | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B424D
#1B424D
oklch(35.6% 0.048 219)
- #523329
#523329
oklch(35.6% 0.048 38.6)
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 #1B424D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.020
- Dark Blue Grey #1F3B4D ΔE 0.024
- Midnight Green #073B4C ΔE 0.030
- Dark Grey Blue #29465B ΔE 0.031
- Dark Teal #014D4E ΔE 0.037
- Onyx #343A40 ΔE 0.038
- Charcoal Grey #3C4142 ΔE 0.043
- Dark Slate Gray #2F4F4F ΔE 0.051
Use #1B424D 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.