#1B2C4E
Closest named color: Prussian Blue (#1D3557). oklch(29.7% 0.066 262.9), rgb(27, 44, 78).
Aa
White text reads best on this color (13.84:1).
About this color
#1B2C4E is a dark, muted blue. In OKLCH its lightness is 30%, its chroma 0.066 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.031 away. White text reads best on it, at 13.84:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | muted (0.066) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.51:1 |
| White text | 13.84:1 |
Values
| HEX | #1B2C4E |
| RGB | rgb(27, 44, 78) |
| HSL | hsl(220, 49%, 21%) |
| OKLCH | oklch(29.7% 0.066 262.9) |
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 #1B2C4E | 13.84:1 | AAA | Lc -103.4 | Preferred for body text |
| Black text on #1B2C4E | 1.51:1 | Fails | Lc 0.0 | Not readable |
| #1B2C4E text on white | 13.84:1 | AAA | Lc 100.3 | Preferred for body text |
| #1B2C4E text on black | 1.51:1 | 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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAFA
oklch(93.6% 0.023 264.5)
-
Step 200
200
#CADAF7
oklch(88.5% 0.044 262.4)
-
Step 300
300
#A6C1F4
oklch(80.9% 0.078 262.9)
-
Step 400
400
#779FEF
oklch(70.7% 0.126 263.3)
-
Step 500
500
#5485E9
oklch(63.1% 0.16 263)
-
Step 600
600
#396CD7
oklch(55.5% 0.174 262.9)
-
Step 700
700
#2C5ABB
oklch(49.2% 0.161 262.8)
-
Step 800
800
#254A97
oklch(42.7% 0.134 262.8)
-
Step 900
900
#233F78
oklch(37.8% 0.103 262.8)
-
Step 950
950 (this color)
#1B2C4E
oklch(29.7% 0.066 262.9)
#1B2C4E 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) | #1D2F4F | 0.010 |
| Deuteranopia (no green cones) | #172A4D | 0.009 |
| Tritanopia (no blue cones) | #003439 | 0.058 |
| Achromatopsia (no color) | #2D2D2D | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B2C4E
#1B2C4E
oklch(29.7% 0.066 262.9)
- #3C2A00
#3C2A00
oklch(29.8% 0.061 83.4)
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 #1B2C4E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.031
- Space Cadet #2B2D42 ΔE 0.033
- Marine #042E60 ΔE 0.036
- Oxford Blue #1B263B ΔE 0.037
- Gunmetal #293241 ΔE 0.041
- Midnight Green #073B4C ΔE 0.051
- Dark Blue Grey #1F3B4D ΔE 0.051
- Dark #1B2431 ΔE 0.055
Use #1B2C4E 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.