#1B335A
Closest named color: Prussian Blue (#1D3557). oklch(32.3% 0.076 259.6), rgb(27, 51, 90).
Aa
White text reads best on this color (12.59:1).
About this color
#1B335A is a dark, moderately saturated blue. In OKLCH its lightness is 32%, its chroma 0.076 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.010 away. White text reads best on it, at 12.59:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.66:1 |
| White text | 12.59:1 |
Values
| HEX | #1B335A |
| RGB | rgb(27, 51, 90) |
| HSL | hsl(217, 54%, 23%) |
| OKLCH | oklch(32.3% 0.076 259.6) |
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 #1B335A | 12.59:1 | AAA | Lc -101.8 | Preferred for body text |
| Black text on #1B335A | 1.66:1 | Fails | Lc 0.0 | Not readable |
| #1B335A text on white | 12.59:1 | AAA | Lc 98.4 | Preferred for body text |
| #1B335A text on black | 1.66:1 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFC
oklch(93.7% 0.026 259)
-
Step 200
200
#C6DAFB
oklch(88.4% 0.051 260.4)
-
Step 300
300
#9EC2FB
oklch(80.9% 0.09 259.4)
-
Step 400
400
#69A0F9
oklch(70.7% 0.144 259.6)
-
Step 500
500
#3F85F6
oklch(63.1% 0.183 259.6)
-
Step 600
600
#1C6BE5
oklch(55.5% 0.2 259.7)
-
Step 700
700
#0D59C7
oklch(49.2% 0.185 259.5)
-
Step 800
800
#1049A1
oklch(42.7% 0.154 259.7)
-
Step 900
900
#153E80
oklch(37.6% 0.121 259.7)
-
Step 950
950 (this color)
#1B335A
oklch(32.3% 0.076 259.6)
#1B335A 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) | #21365C | 0.013 |
| Deuteranopia (no green cones) | #183159 | 0.008 |
| Tritanopia (no blue cones) | #003C42 | 0.062 |
| Achromatopsia (no color) | #333333 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B335A
#1B335A
oklch(32.3% 0.076 259.6)
- #462F00
#462F00
oklch(32.4% 0.067 79.2)
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 #1B335A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.010
- Marine #042E60 ΔE 0.029
- Marine Blue #01386A ΔE 0.032
- Dark Blue Grey #1F3B4D ΔE 0.040
- Midnight Green #073B4C ΔE 0.043
- Space Cadet #2B2D42 ΔE 0.046
- Gunmetal #293241 ΔE 0.047
- Oxford Blue #1B263B ΔE 0.064
Use #1B335A 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.