#03447C
Closest named color: Twilight Blue (#0A437A). oklch(38.4% 0.111 251.7), rgb(3, 68, 124).
Aa
White text reads best on this color (9.89:1).
About this color
#03447C is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.111 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.004 away. White text reads best on it, at 9.89:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.12:1 |
| White text | 9.89:1 |
Values
| HEX | #03447C |
| RGB | rgb(3, 68, 124) |
| HSL | hsl(208, 95%, 25%) |
| OKLCH | oklch(38.4% 0.111 251.7) |
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 #03447C | 9.89:1 | AAA | Lc -96.6 | Preferred for body text |
| Black text on #03447C | 2.12:1 | Fails | Lc 11.6 | Not readable |
| #03447C text on white | 9.89:1 | AAA | Lc 92.4 | Preferred for body text |
| #03447C text on black | 2.12:1 | Fails | Lc -10.0 | 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 900.
-
Step 50
50
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DFEBFA
oklch(93.6% 0.024 254)
-
Step 200
200
#C4DCF8
oklch(88.6% 0.047 252.4)
-
Step 300
300
#99C5F6
oklch(81% 0.084 251.6)
-
Step 400
400
#5DA5F1
oklch(70.8% 0.133 251.4)
-
Step 500
500
#248BEC
oklch(63% 0.171 251.9)
-
Step 600
600
#0074CF
oklch(55.5% 0.165 251.7)
-
Step 700
700
#0061AF
oklch(49% 0.146 251.8)
-
Step 800
800
#005091
oklch(42.8% 0.126 251.5)
-
Step 900
900 (this color)
#03447C
oklch(38.4% 0.111 251.7)
-
Step 950
950
#062747
oklch(26.9% 0.07 251.5)
#03447C 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) | #26487E | 0.028 |
| Deuteranopia (no green cones) | #0D3E7B | 0.017 |
| Tritanopia (no blue cones) | #00525A | 0.082 |
| Achromatopsia (no color) | #434343 | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #03447C
#03447C
oklch(38.4% 0.111 251.7)
- #5E3B00
#5E3B00
oklch(38.4% 0.082 72.1)
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 #03447C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.004
- Cobalt #1E488F ΔE 0.038
- Light Navy #155084 ΔE 0.040
- Marine Blue #01386A ΔE 0.045
- Deep Sea Blue #015482 ΔE 0.048
- Dusk Blue #26538D ΔE 0.058
- Dark Grey Blue #29465B ΔE 0.063
- Prussian Blue #1D3557 ΔE 0.071
Use #03447C 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.