#001F4C
Closest named color: Navy Blue (#001146). oklch(25% 0.091 257.7), rgb(0, 31, 76).
Aa
White text reads best on this color (16.14:1).
About this color
#001F4C is a very dark, moderately saturated blue. In OKLCH its lightness is 25%, its chroma 0.091 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.042 away. White text reads best on it, at 16.14:1.
| Hue family | Blues |
| Lightness | very dark (25%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.30:1 |
| White text | 16.14:1 |
Values
| HEX | #001F4C |
| RGB | rgb(0, 31, 76) |
| HSL | hsl(216, 100%, 15%) |
| OKLCH | oklch(25% 0.091 257.7) |
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 #001F4C | 16.14:1 | AAA | Lc -105.3 | Preferred for body text |
| Black text on #001F4C | 1.30:1 | Fails | Lc 0.0 | Not readable |
| #001F4C text on white | 16.14:1 | AAA | Lc 102.7 | Preferred for body text |
| #001F4C text on black | 1.30:1 | 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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DDEBFF
oklch(93.6% 0.031 257.2)
-
Step 200
200
#C2DBFF
oklch(88.5% 0.057 257.5)
-
Step 300
300
#99C3FF
oklch(80.9% 0.097 257.3)
-
Step 400
400
#60A1FF
oklch(70.8% 0.154 257.7)
-
Step 500
500
#2B85FF
oklch(63.1% 0.2 257.7)
-
Step 600
600
#006CE7
oklch(55.5% 0.204 257.8)
-
Step 700
700
#005BC3
oklch(49.1% 0.179 257.6)
-
Step 800
800
#004AA2
oklch(42.7% 0.156 257.7)
-
Step 900
900
#003D89
oklch(37.7% 0.139 257.9)
-
Step 950
950 (this color)
#001F4C
oklch(25% 0.091 257.7)
#001F4C 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) | #00244E | 0.016 |
| Deuteranopia (no green cones) | #001E4B | 0.004 |
| Tritanopia (no blue cones) | #002A32 | 0.067 |
| Achromatopsia (no color) | #212121 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #001F4C
#001F4C
oklch(25% 0.091 257.7)
- #2F1E00
#2F1E00
oklch(25% 0.052 78.5)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes and gradients that use #001F4C
These curated palettes and gradients contain exactly #001F4C. Open one to see the full color scheme around it.
Palettes
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.042
- Oxford Blue #1B263B ΔE 0.053
- Marine #042E60 ΔE 0.058
- Dark Indigo #1F0954 ΔE 0.061
- Darkblue #030764 ΔE 0.063
- Dark #1B2431 ΔE 0.064
- Rich Black #0D1B2A ΔE 0.065
- Night Blue #040348 ΔE 0.068
Use #001F4C 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.