#1B334A
Closest named color: Gunmetal (#293241). oklch(31.3% 0.051 248.8), rgb(27, 51, 74).
Aa
White text reads best on this color (12.97:1).
About this color
#1B334A is a dark, muted blue. In OKLCH its lightness is 31%, its chroma 0.051 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Gunmetal (#293241), ΔE 0.023 away. White text reads best on it, at 12.97:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.61:1 |
| White text | 12.97:1 |
Values
| HEX | #1B334A |
| RGB | rgb(27, 51, 74) |
| HSL | hsl(209, 47%, 20%) |
| OKLCH | oklch(31.3% 0.051 248.8) |
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 #1B334A | 12.97:1 | AAA | Lc -102.4 | Preferred for body text |
| Black text on #1B334A | 1.61:1 | Fails | Lc 0.0 | Not readable |
| #1B334A text on white | 12.97:1 | AAA | Lc 99.1 | Preferred for body text |
| #1B334A text on black | 1.61:1 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C9DCEF
oklch(88.6% 0.033 248.2)
-
Step 300
300
#A3C5E7
oklch(81% 0.061 248.6)
-
Step 400
400
#6FA6DB
oklch(70.8% 0.097 248.5)
-
Step 500
500
#468ED1
oklch(63.1% 0.125 249)
-
Step 600
600
#2277BE
oklch(55.6% 0.135 248.7)
-
Step 700
700
#1364A4
oklch(49.2% 0.125 248.6)
-
Step 800
800
#155285
oklch(42.8% 0.104 248.7)
-
Step 900
900
#19446A
oklch(37.7% 0.081 248.4)
-
Step 950
950 (this color)
#1B334A
oklch(31.3% 0.051 248.8)
#1B334A 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) | #29344B | 0.020 |
| Deuteranopia (no green cones) | #232F4A | 0.016 |
| Tritanopia (no blue cones) | #00383B | 0.043 |
| Achromatopsia (no color) | #313131 | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B334A
#1B334A
oklch(31.3% 0.051 248.8)
- #422C12
#422C12
oklch(31.3% 0.051 68.6)
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 #1B334A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.023
- Prussian Blue #1D3557 ΔE 0.024
- Dark Blue Grey #1F3B4D ΔE 0.027
- Midnight Green #073B4C ΔE 0.028
- Space Cadet #2B2D42 ΔE 0.028
- Oxford Blue #1B263B ΔE 0.046
- Marine #042E60 ΔE 0.049
- Onyx #343A40 ΔE 0.050
Use #1B334A 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.