#01447B
Closest named color: Twilight Blue (#0A437A). oklch(38.3% 0.11 251), rgb(1, 68, 123).
Aa
White text reads best on this color (9.93:1).
About this color
#01447B is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.110 and its hue 251°. 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 9.93:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.11:1 |
| White text | 9.93:1 |
Values
| HEX | #01447B |
| RGB | rgb(1, 68, 123) |
| HSL | hsl(207, 98%, 24%) |
| OKLCH | oklch(38.3% 0.11 251) |
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 #01447B | 9.93:1 | AAA | Lc -96.7 | Preferred for body text |
| Black text on #01447B | 2.11:1 | Fails | Lc 11.5 | Not readable |
| #01447B text on white | 9.93:1 | AAA | Lc 92.5 | Preferred for body text |
| #01447B text on black | 2.11:1 | 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
#C3DCF7
oklch(88.5% 0.046 250.4)
-
Step 300
300
#99C5F5
oklch(80.9% 0.083 251)
-
Step 400
400
#5DA5F0
oklch(70.7% 0.132 251.1)
-
Step 500
500
#218CEB
oklch(63.1% 0.169 250.9)
-
Step 600
600
#0075CD
oklch(55.6% 0.161 250.9)
-
Step 700
700
#0062AE
oklch(49.1% 0.143 251.1)
-
Step 800
800
#005090
oklch(42.7% 0.125 251.1)
-
Step 900
900 (this color)
#01447B
oklch(38.3% 0.11 251)
-
Step 950
950
#062747
oklch(26.9% 0.07 251.5)
#01447B 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) | #27487D | 0.030 |
| Deuteranopia (no green cones) | #0F3E7A | 0.017 |
| Tritanopia (no blue cones) | #005159 | 0.080 |
| Achromatopsia (no color) | #434343 | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #01447B
#01447B
oklch(38.3% 0.11 251)
- #5E3A00
#5E3A00
oklch(38.2% 0.082 70.8)
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 #01447B, 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 0.040
- Light Navy #155084 ΔE 0.041
- Marine Blue #01386A ΔE 0.044
- Deep Sea Blue #015482 ΔE 0.049
- Dusk Blue #26538D ΔE 0.060
- Dark Grey Blue #29465B ΔE 0.062
- Prussian Blue #1D3557 ΔE 0.070
Use #01447B 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.