#04173D
Closest named color: Navy Blue (#001146). oklch(21.7% 0.078 261.3), rgb(4, 23, 61).
Aa
White text reads best on this color (17.57:1).
About this color
#04173D is a very dark, moderately saturated blue. In OKLCH its lightness is 22%, its chroma 0.078 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.025 away. White text reads best on it, at 17.57:1.
| Hue family | Blues |
| Lightness | very dark (22%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.19:1 |
| White text | 17.57:1 |
Values
| HEX | #04173D |
| RGB | rgb(4, 23, 61) |
| HSL | hsl(220, 88%, 13%) |
| OKLCH | oklch(21.7% 0.078 261.3) |
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 #04173D | 17.57:1 | AAA | Lc -106.4 | Preferred for body text |
| Black text on #04173D | 1.19:1 | Fails | Lc 0.0 | Not readable |
| #04173D text on white | 17.57:1 | AAA | Lc 104.1 | Preferred for body text |
| #04173D text on black | 1.19:1 | 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
#E0EAFC
oklch(93.5% 0.027 262.3)
-
Step 200
200
#C7DAFC
oklch(88.5% 0.051 262.1)
-
Step 300
300
#9FC1FD
oklch(80.8% 0.093 261.6)
-
Step 400
400
#6B9FFC
oklch(70.7% 0.148 261.3)
-
Step 500
500
#4383F9
oklch(63% 0.188 261.4)
-
Step 600
600
#2469E8
oklch(55.5% 0.205 261.4)
-
Step 700
700
#1757CA
oklch(49.2% 0.19 261.2)
-
Step 800
800
#1648A3
oklch(42.8% 0.157 261.2)
-
Step 900
900
#183D81
oklch(37.6% 0.123 261.3)
-
Step 950
950 (this color)
#04173D
oklch(21.7% 0.078 261.3)
#04173D 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) | #001C3E | 0.016 |
| Deuteranopia (no green cones) | #00173C | 0.006 |
| Tritanopia (no blue cones) | #002027 | 0.058 |
| Achromatopsia (no color) | #191919 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #04173D
#04173D
oklch(21.7% 0.078 261.3)
- #241700
#241700
oklch(21.6% 0.045 81.1)
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 #04173D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.025
- Rich Black #0D1B2A ΔE 0.043
- Night Blue #040348 ΔE 0.051
- Dark Navy #000435 ΔE 0.060
- Oxford Blue #1B263B ΔE 0.063
- Dark Indigo #1F0954 ΔE 0.064
- Dark #1B2431 ΔE 0.065
- Very Dark Blue #000133 ΔE 0.072
Use #04173D 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.