#03409C
Closest named color: Sapphire (#2138AB). oklch(40.1% 0.16 260.1), rgb(3, 64, 156).
Aa
White text reads best on this color (9.47:1).
About this color
#03409C is a dark, vivid blue. In OKLCH its lightness is 40%, its chroma 0.160 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.034 away. White text reads best on it, at 9.47:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | vivid (0.160) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.21:1 |
| White text | 9.47:1 |
Values
| HEX | #03409C |
| RGB | rgb(3, 64, 156) |
| HSL | hsl(216, 96%, 31%) |
| OKLCH | oklch(40.1% 0.16 260.1) |
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 #03409C | 9.47:1 | AAA | Lc -95.4 | Preferred for body text |
| Black text on #03409C | 2.21:1 | Fails | Lc 12.9 | Not readable |
| #03409C text on white | 9.47:1 | AAA | Lc 91.1 | Preferred for body text |
| #03409C text on black | 2.21:1 | Fails | Lc -11.3 | 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
#C4DAFF
oklch(88.4% 0.057 260.8)
-
Step 300
300
#9CC2FF
oklch(80.9% 0.096 259.7)
-
Step 400
400
#669FFF
oklch(70.7% 0.154 260.3)
-
Step 500
500
#3983FF
oklch(63.1% 0.199 260.2)
-
Step 600
600
#0067F5
oklch(55.7% 0.227 260)
-
Step 700
700
#0056D0
oklch(49.2% 0.201 260.1)
-
Step 800
800
#0046AC
oklch(42.7% 0.175 260)
-
Step 900
900 (this color)
#03409C
oklch(40.1% 0.16 260.1)
-
Step 950
950
#032257
oklch(26.9% 0.103 260.2)
#03409C 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) | #004D9F | 0.035 |
| Deuteranopia (no green cones) | #00409A | 0.004 |
| Tritanopia (no blue cones) | #005867 | 0.123 |
| Achromatopsia (no color) | #464646 | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #03409C
#03409C
oklch(40.1% 0.16 260.1)
- #5F4200
#5F4200
oklch(40.1% 0.083 80.2)
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 #03409C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.034
- Cobalt #1E488F ΔE 0.036
- Twilight Blue #0A437A ΔE 0.058
- Light Navy #155084 ΔE 0.064
- Blueberry #464196 ΔE 0.067
- Dusk Blue #26538D ΔE 0.067
- Blue Blue #2242C7 ΔE 0.073
- Dark Slate Blue #483D8B ΔE 0.074
Use #03409C 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.