#1B3545
Closest named color: Gunmetal (#293241). oklch(31.6% 0.043 237.3), rgb(27, 53, 69).
Aa
White text reads best on this color (12.79:1).
About this color
#1B3545 is a dark, muted blue. In OKLCH its lightness is 32%, its chroma 0.043 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Gunmetal (#293241), ΔE 0.020 away. White text reads best on it, at 12.79:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.64:1 |
| White text | 12.79:1 |
Values
| HEX | #1B3545 |
| RGB | rgb(27, 53, 69) |
| HSL | hsl(203, 44%, 19%) |
| OKLCH | oklch(31.6% 0.043 237.3) |
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 #1B3545 | 12.79:1 | AAA | Lc -102.1 | Preferred for body text |
| Black text on #1B3545 | 1.64:1 | Fails | Lc 0.0 | Not readable |
| #1B3545 text on white | 12.79:1 | AAA | Lc 98.8 | Preferred for body text |
| #1B3545 text on black | 1.64:1 | 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 950.
-
Step 50
50
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF3
oklch(93.7% 0.015 235.4)
-
Step 200
200
#C8DCEA
oklch(88.4% 0.029 238.3)
-
Step 300
300
#A2C6DE
oklch(80.8% 0.051 237.5)
-
Step 400
400
#6EA8CD
oklch(70.6% 0.081 237.5)
-
Step 500
500
#4392C1
oklch(63.1% 0.105 237.8)
-
Step 600
600
#1B7CAD
oklch(55.7% 0.113 237.1)
-
Step 700
700
#076895
oklch(49.1% 0.106 237.6)
-
Step 800
800
#0F5579
oklch(42.7% 0.088 237.7)
-
Step 900
900
#174661
oklch(37.6% 0.068 237.9)
-
Step 950
950 (this color)
#1B3545
oklch(31.6% 0.043 237.3)
#1B3545 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) | #2E3546 | 0.026 |
| Deuteranopia (no green cones) | #283045 | 0.023 |
| Tritanopia (no blue cones) | #01393A | 0.035 |
| Achromatopsia (no color) | #323232 | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B3545
#1B3545
oklch(31.6% 0.043 237.3)
- #422C1B
#422C1B
oklch(31.5% 0.043 58.1)
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 #1B3545, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.020
- Midnight Green #073B4C ΔE 0.023
- Dark Blue Grey #1F3B4D ΔE 0.023
- Space Cadet #2B2D42 ΔE 0.032
- Prussian Blue #1D3557 ΔE 0.033
- Onyx #343A40 ΔE 0.042
- Oxford Blue #1B263B ΔE 0.050
- Charcoal #264653 ΔE 0.060
Use #1B3545 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.