#1B424F
Closest named color: Charcoal (#264653). oklch(35.7% 0.049 222.7), rgb(27, 66, 79).
Aa
White text reads best on this color (10.83:1).
About this color
#1B424F is a dark, muted teal or cyan. In OKLCH its lightness is 36%, its chroma 0.049 and its hue 223°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal (#264653), ΔE 0.019 away. White text reads best on it, at 10.83:1.
| Hue family | Teals and cyans |
| Lightness | dark (36%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Charcoal (#264653) |
| Black text | 1.93:1 |
| White text | 10.83:1 |
Values
| HEX | #1B424F |
| RGB | rgb(27, 66, 79) |
| HSL | hsl(195, 49%, 21%) |
| OKLCH | oklch(35.7% 0.049 222.7) |
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 #1B424F | 10.83:1 | AAA | Lc -98.8 | Preferred for body text |
| Black text on #1B424F | 1.93:1 | Fails | Lc 9.0 | Not readable |
| #1B424F text on white | 10.83:1 | AAA | Lc 94.9 | Preferred for body text |
| #1B424F text on black | 1.93:1 | Fails | Lc -7.7 | 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
#E3ECEF
oklch(93.7% 0.01 219.6)
-
Step 200
200
#CBDCE3
oklch(88.4% 0.021 224.3)
-
Step 300
300
#A8C6D2
oklch(80.8% 0.036 224)
-
Step 400
400
#78A9BB
oklch(70.6% 0.058 222.8)
-
Step 500
500
#5294AB
oklch(63.2% 0.076 222.8)
-
Step 600
600
#337E96
oklch(55.7% 0.082 222.4)
-
Step 700
700
#246A80
oklch(49.1% 0.076 222.7)
-
Step 800
800
#205668
oklch(42.6% 0.063 223.4)
-
Step 900
900 (this color)
#1B424F
oklch(35.7% 0.049 222.7)
-
Step 950
950
#142A31
oklch(27% 0.031 220.6)
#1B424F 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) | #3A4050 | 0.039 |
| Deuteranopia (no green cones) | #333B4F | 0.035 |
| Tritanopia (no blue cones) | #004646 | 0.029 |
| Achromatopsia (no color) | #3D3D3D | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B424F
#1B424F
oklch(35.7% 0.049 222.7)
- #523427
#523427
oklch(35.7% 0.049 44.2)
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 #1B424F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.019
- Dark Blue Grey #1F3B4D ΔE 0.023
- Dark Grey Blue #29465B ΔE 0.029
- Midnight Green #073B4C ΔE 0.030
- Dark Teal #014D4E ΔE 0.038
- Onyx #343A40 ΔE 0.039
- Charcoal Grey #3C4142 ΔE 0.045
- Prussian Blue #1D3557 ΔE 0.049
Use #1B424F 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.