#00447A
Closest named color: Twilight Blue (#0A437A). oklch(38.2% 0.109 250.4), rgb(0, 68, 122).
Aa
White text reads best on this color (9.96:1).
About this color
#00447A is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.109 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.005 away. White text reads best on it, at 9.96:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.10:1 |
| White text | 9.96:1 |
Values
| HEX | #00447A |
| RGB | rgb(0, 68, 122) |
| HSL | hsl(207, 100%, 24%) |
| OKLCH | oklch(38.2% 0.109 250.4) |
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 #00447A | 9.96:1 | AAA | Lc -96.7 | Preferred for body text |
| Black text on #00447A | 2.10:1 | Fails | Lc 11.4 | Not readable |
| #00447A text on white | 9.96:1 | AAA | Lc 92.5 | Preferred for body text |
| #00447A text on black | 2.10:1 | Fails | Lc -9.9 | 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
#99C5F4
oklch(80.9% 0.082 250.5)
-
Step 400
400
#5CA5EF
oklch(70.6% 0.131 250.5)
-
Step 500
500
#208CEA
oklch(63% 0.168 250.6)
-
Step 600
600
#0075CC
oklch(55.6% 0.16 250.6)
-
Step 700
700
#0062AC
oklch(49% 0.141 250.5)
-
Step 800
800
#00508F
oklch(42.6% 0.123 250.8)
-
Step 900
900 (this color)
#00447A
oklch(38.2% 0.109 250.4)
-
Step 950
950
#062747
oklch(26.9% 0.07 251.5)
#00447A 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) | #28487C | 0.032 |
| Deuteranopia (no green cones) | #103E79 | 0.018 |
| Tritanopia (no blue cones) | #005159 | 0.078 |
| Achromatopsia (no color) | #434343 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00447A
#00447A
oklch(38.2% 0.109 250.4)
- #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 #00447A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.005
- Light Navy #155084 ΔE 0.041
- Cobalt #1E488F ΔE 0.042
- Marine Blue #01386A ΔE 0.043
- Deep Sea Blue #015482 ΔE 0.049
- Dark Grey Blue #29465B ΔE 0.060
- Dusk Blue #26538D ΔE 0.061
- Prussian Blue #1D3557 ΔE 0.069
Use #00447A 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.