#1B403E
Closest named color: Dark Blue Grey (#1F3B4D). oklch(34.4% 0.043 190.7), rgb(27, 64, 62).
Aa
White text reads best on this color (11.35:1).
About this color
#1B403E is a dark, muted teal or cyan. In OKLCH its lightness is 34%, its chroma 0.043 and its hue 191°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.037 away. White text reads best on it, at 11.35:1.
| Hue family | Teals and cyans |
| Lightness | dark (34%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.84:1 |
| White text | 11.35:1 |
Values
| HEX | #1B403E |
| RGB | rgb(27, 64, 62) |
| HSL | hsl(177, 41%, 18%) |
| OKLCH | oklch(34.4% 0.043 190.7) |
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 #1B403E | 11.35:1 | AAA | Lc -99.8 | Preferred for body text |
| Black text on #1B403E | 1.84:1 | Fails | Lc 7.8 | Not readable |
| #1B403E text on white | 11.35:1 | AAA | Lc 96.1 | Preferred for body text |
| #1B403E text on black | 1.84:1 | Fails | Lc 0.0 | 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
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E3ECEB
oklch(93.6% 0.01 189.1)
-
Step 200
200
#CDDDDC
oklch(88.5% 0.017 192.3)
-
Step 300
300
#AAC8C5
oklch(81% 0.033 189.1)
-
Step 400
400
#7CABA8
oklch(70.7% 0.05 191.1)
-
Step 500
500
#589693
oklch(63% 0.064 191.7)
-
Step 600
600
#3A817D
oklch(55.7% 0.071 190.3)
-
Step 700
700
#2C6D69
oklch(49.2% 0.066 189.7)
-
Step 800
800
#265956
oklch(42.8% 0.055 190.1)
-
Step 900
900 (this color)
#1B403E
oklch(34.4% 0.043 190.7)
-
Step 950
950
#162B29
oklch(27.1% 0.027 187.9)
#1B403E 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) | #3C3D3E | 0.044 |
| Deuteranopia (no green cones) | #36383E | 0.042 |
| Tritanopia (no blue cones) | #04423F | 0.015 |
| Achromatopsia (no color) | #3A3A3A | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B403E
#1B403E
oklch(34.4% 0.043 190.7)
- #4C3034
#4C3034
oklch(34.4% 0.041 10.1)
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 #1B403E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.037
- Onyx #343A40 ΔE 0.037
- Midnight Green #073B4C ΔE 0.037
- Charcoal #264653 ΔE 0.041
- Dark Teal #014D4E ΔE 0.044
- Charcoal Grey #3C4142 ΔE 0.045
- Evergreen #05472A ΔE 0.050
- Gunmetal #293241 ΔE 0.051
Use #1B403E 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.