#03419B
Closest named color: Cobalt (#1E488F). oklch(40.2% 0.158 259.7), rgb(3, 65, 155).
Aa
White text reads best on this color (9.40:1).
About this color
#03419B is a dark, vivid blue. In OKLCH its lightness is 40%, its chroma 0.158 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.033 away. White text reads best on it, at 9.40:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | vivid (0.158) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.23:1 |
| White text | 9.40:1 |
Values
| HEX | #03419B |
| RGB | rgb(3, 65, 155) |
| HSL | hsl(216, 96%, 31%) |
| OKLCH | oklch(40.2% 0.158 259.7) |
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 #03419B | 9.40:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #03419B | 2.23:1 | Fails | Lc 13.0 | Not readable |
| #03419B text on white | 9.40:1 | AAA | Lc 90.9 | Preferred for body text |
| #03419B text on black | 2.23:1 | Fails | Lc -11.4 | 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
#DEEBFF
oklch(93.6% 0.031 258.9)
-
Step 200
200
#C4DBFF
oklch(88.6% 0.056 259.3)
-
Step 300
300
#9CC2FF
oklch(80.9% 0.096 259.7)
-
Step 400
400
#659FFF
oklch(70.6% 0.154 260)
-
Step 500
500
#3783FF
oklch(63% 0.199 259.9)
-
Step 600
600
#0068F2
oklch(55.6% 0.223 259.6)
-
Step 700
700
#0057CD
oklch(49.1% 0.196 259.6)
-
Step 800
800
#0047AA
oklch(42.8% 0.171 259.6)
-
Step 900
900 (this color)
#03419B
oklch(40.2% 0.158 259.7)
-
Step 950
950
#032356
oklch(27% 0.1 259.5)
#03419B 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) | #004D9E | 0.032 |
| Deuteranopia (no green cones) | #004099 | 0.005 |
| Tritanopia (no blue cones) | #005867 | 0.120 |
| Achromatopsia (no color) | #464646 | 0.158 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #03419B
#03419B
oklch(40.2% 0.158 259.7)
- #604200
#604200
oklch(40.2% 0.084 79.3)
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 #03419B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.033
- Sapphire #2138AB ΔE 0.036
- Twilight Blue #0A437A ΔE 0.056
- Light Navy #155084 ΔE 0.061
- Dusk Blue #26538D ΔE 0.064
- Blueberry #464196 ΔE 0.066
- Deep Sea Blue #015482 ΔE 0.072
- Dark Slate Blue #483D8B ΔE 0.073
Use #03419B 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.