#1B2E4E
Closest named color: Prussian Blue (#1D3557). oklch(30.2% 0.063 260.3), rgb(27, 46, 78).
Aa
White text reads best on this color (13.57:1).
About this color
#1B2E4E is a dark, muted blue. In OKLCH its lightness is 30%, its chroma 0.063 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.026 away. White text reads best on it, at 13.57:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.54:1 |
| White text | 13.57:1 |
Values
| HEX | #1B2E4E |
| RGB | rgb(27, 46, 78) |
| HSL | hsl(218, 49%, 21%) |
| OKLCH | oklch(30.2% 0.063 260.3) |
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 #1B2E4E | 13.57:1 | AAA | Lc -103.1 | Preferred for body text |
| Black text on #1B2E4E | 1.54:1 | Fails | Lc 0.0 | Not readable |
| #1B2E4E text on white | 13.57:1 | AAA | Lc 99.9 | Preferred for body text |
| #1B2E4E text on black | 1.54:1 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CADAF5
oklch(88.5% 0.041 260.9)
-
Step 300
300
#A5C2F2
oklch(80.9% 0.075 260.4)
-
Step 400
400
#74A1EB
oklch(70.7% 0.12 260)
-
Step 500
500
#5087E5
oklch(63.1% 0.154 260.4)
-
Step 600
600
#346FD3
oklch(55.7% 0.166 260.3)
-
Step 700
700
#265CB7
oklch(49.1% 0.155 260.2)
-
Step 800
800
#214C94
oklch(42.8% 0.128 260.1)
-
Step 900
900
#204076
oklch(37.8% 0.1 260.2)
-
Step 950
950 (this color)
#1B2E4E
oklch(30.2% 0.063 260.3)
#1B2E4E 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) | #20314F | 0.013 |
| Deuteranopia (no green cones) | #1A2C4D | 0.007 |
| Tritanopia (no blue cones) | #00353A | 0.054 |
| Achromatopsia (no color) | #2E2E2E | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B2E4E
#1B2E4E
oklch(30.2% 0.063 260.3)
- #3F2A00
#3F2A00
oklch(30.3% 0.063 79.3)
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 #1B2E4E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.026
- Space Cadet #2B2D42 ΔE 0.030
- Gunmetal #293241 ΔE 0.036
- Marine #042E60 ΔE 0.037
- Oxford Blue #1B263B ΔE 0.039
- Dark Blue Grey #1F3B4D ΔE 0.045
- Midnight Green #073B4C ΔE 0.045
- Marine Blue #01386A ΔE 0.054
Use #1B2E4E 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.