#003B84
Closest named color: Twilight Blue (#0A437A). oklch(36.8% 0.135 257.7), rgb(0, 59, 132).
Aa
White text reads best on this color (10.72:1).
About this color
#003B84 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.135 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.031 away. White text reads best on it, at 10.72:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.135) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.95:1 |
| White text | 10.72:1 |
Values
| HEX | #003B84 |
| RGB | rgb(0, 59, 132) |
| HSL | hsl(213, 100%, 26%) |
| OKLCH | oklch(36.8% 0.135 257.7) |
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 #003B84 | 10.72:1 | AAA | Lc -98.1 | Preferred for body text |
| Black text on #003B84 | 1.95:1 | Fails | Lc 9.8 | Not readable |
| #003B84 text on white | 10.72:1 | AAA | Lc 94.1 | Preferred for body text |
| #003B84 text on black | 1.95:1 | Fails | Lc -8.4 | 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 900.
-
Step 50
50
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DEEBFE
oklch(93.6% 0.029 257.8)
-
Step 200
200
#C3DBFF
oklch(88.5% 0.056 258.4)
-
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 (this color)
#003B84
oklch(36.8% 0.135 257.7)
-
Step 950
950
#06254F
oklch(27% 0.085 257.4)
#003B84 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) | #004487 | 0.026 |
| Deuteranopia (no green cones) | #003983 | 0.006 |
| Tritanopia (no blue cones) | #004D59 | 0.101 |
| Achromatopsia (no color) | #3E3E3E | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #003B84
#003B84
oklch(36.8% 0.135 257.7)
- #553900
#553900
oklch(36.8% 0.077 77.9)
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 #003B84, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.031
- Marine Blue #01386A ΔE 0.045
- Cobalt #1E488F ΔE 0.047
- Light Navy #155084 ΔE 0.065
- Sapphire #2138AB ΔE 0.069
- Marine #042E60 ΔE 0.071
- Deep Sea Blue #015482 ΔE 0.075
- Royal #0C1793 ΔE 0.077
Use #003B84 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.