#1F2E5B
Closest named color: Prussian Blue (#1D3557). oklch(31.4% 0.083 267.6), rgb(31, 46, 91).
Aa
White text reads best on this color (13.12:1).
About this color
#1F2E5B is a dark, moderately saturated blue. In OKLCH its lightness is 31%, its chroma 0.083 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.024 away. White text reads best on it, at 13.12:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.60:1 |
| White text | 13.12:1 |
Values
| HEX | #1F2E5B |
| RGB | rgb(31, 46, 91) |
| HSL | hsl(225, 49%, 24%) |
| OKLCH | oklch(31.4% 0.083 267.6) |
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 #1F2E5B | 13.12:1 | AAA | Lc -102.5 | Preferred for body text |
| Black text on #1F2E5B | 1.60:1 | Fails | Lc 0.0 | Not readable |
| #1F2E5B text on white | 13.12:1 | AAA | Lc 99.2 | Preferred for body text |
| #1F2E5B text on black | 1.60:1 | 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
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFE
oklch(93.6% 0.029 266.4)
-
Step 200
200
#C9D9FE
oklch(88.5% 0.054 266.8)
-
Step 300
300
#A6BFFF
oklch(80.9% 0.095 267.8)
-
Step 400
400
#779BFF
oklch(70.7% 0.152 267.5)
-
Step 500
500
#567DFF
oklch(63% 0.198 267.8)
-
Step 600
600
#3D62F0
oklch(55.7% 0.217 267.5)
-
Step 700
700
#304FD1
oklch(49% 0.203 267.6)
-
Step 800
800
#2842A9
oklch(42.7% 0.168 267.6)
-
Step 900
900
#243986
oklch(37.6% 0.132 267.9)
-
Step 950
950 (this color)
#1F2E5B
oklch(31.4% 0.083 267.6)
#1F2E5B 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) | #18335D | 0.016 |
| Deuteranopia (no green cones) | #0F2E5A | 0.018 |
| Tritanopia (no blue cones) | #003840 | 0.070 |
| Achromatopsia (no color) | #303030 | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F2E5B
#1F2E5B
oklch(31.4% 0.083 267.6)
- #3F2F00
#3F2F00
oklch(31.5% 0.064 88.1)
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 #1F2E5B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.024
- Marine #042E60 ΔE 0.026
- Marine Blue #01386A ΔE 0.040
- Space Cadet #2B2D42 ΔE 0.047
- Gunmetal #293241 ΔE 0.053
- Dark Blue Grey #1F3B4D ΔE 0.054
- Midnight Green #073B4C ΔE 0.057
- Oxford Blue #1B263B ΔE 0.061
Use #1F2E5B 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.