#004594
Closest named color: Cobalt (#1E488F). oklch(40.4% 0.144 257), rgb(0, 69, 148).
Aa
White text reads best on this color (9.21:1).
About this color
#004594 is a dark, vivid blue. In OKLCH its lightness is 40%, its chroma 0.144 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.021 away. White text reads best on it, at 9.21:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | vivid (0.144) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.27:1 |
| White text | 9.21:1 |
Values
| HEX | #004594 |
| RGB | rgb(0, 69, 148) |
| HSL | hsl(212, 100%, 29%) |
| OKLCH | oklch(40.4% 0.144 257) |
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 #004594 | 9.21:1 | AAA | Lc -94.9 | Preferred for body text |
| Black text on #004594 | 2.27:1 | Fails | Lc 13.5 | Not readable |
| #004594 text on white | 9.21:1 | AAA | Lc 90.5 | Preferred for body text |
| #004594 text on black | 2.27:1 | Fails | Lc -11.8 | 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 800.
-
Step 50
50
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C6DBF8
oklch(88.5% 0.046 256.5)
-
Step 300
300
#9EC3F7
oklch(80.9% 0.084 256.9)
-
Step 400
400
#68A2F3
oklch(70.7% 0.134 256.9)
-
Step 500
500
#3C88EF
oklch(63.1% 0.172 257)
-
Step 600
600
#146FDD
oklch(55.6% 0.186 257)
-
Step 700
700
#025CC0
oklch(49.1% 0.173 257)
-
Step 800
800 (this color)
#004594
oklch(40.4% 0.144 257)
-
Step 900
900
#13407B
oklch(37.6% 0.111 256.9)
-
Step 950
950
#0D2648
oklch(27% 0.07 257)
#004594 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) | #064E97 | 0.026 |
| Deuteranopia (no green cones) | #004292 | 0.009 |
| Tritanopia (no blue cones) | #005965 | 0.109 |
| Achromatopsia (no color) | #484848 | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #004594
#004594
oklch(40.4% 0.144 257)
- #624200
#624200
oklch(40.5% 0.085 77.5)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #004594, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.021
- Twilight Blue #0A437A ΔE 0.043
- Light Navy #155084 ΔE 0.046
- Sapphire #2138AB ΔE 0.051
- Dusk Blue #26538D ΔE 0.052
- Deep Sea Blue #015482 ΔE 0.057
- Blueberry #464196 ΔE 0.065
- Dark Slate Blue #483D8B ΔE 0.070
Use #004594 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.