#00457B
Closest named color: Twilight Blue (#0A437A). oklch(38.5% 0.109 250.2), rgb(0, 69, 123).
Aa
White text reads best on this color (9.82:1).
About this color
#00457B 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 0.006 away. White text reads best on it, at 9.82:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.13:1 |
| White text | 9.82:1 |
Values
| HEX | #00457B |
| RGB | rgb(0, 69, 123) |
| HSL | hsl(206, 100%, 24%) |
| OKLCH | oklch(38.5% 0.109 250.2) |
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 #00457B | 9.82:1 | AAA | Lc -96.4 | Preferred for body text |
| Black text on #00457B | 2.13:1 | Fails | Lc 11.8 | Not readable |
| #00457B text on white | 9.82:1 | AAA | Lc 92.2 | Preferred for body text |
| #00457B text on black | 2.13:1 | Fails | Lc -10.2 | 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
#DEEBFA
oklch(93.5% 0.025 251.9)
-
Step 200
200
#C3DCF7
oklch(88.5% 0.046 250.4)
-
Step 300
300
#98C5F4
oklch(80.8% 0.082 250)
-
Step 400
400
#5CA5EF
oklch(70.6% 0.131 250.5)
-
Step 500
500
#1E8DEA
oklch(63.2% 0.168 250)
-
Step 600
600
#0075CB
oklch(55.5% 0.159 250.4)
-
Step 700
700
#0063AC
oklch(49.2% 0.139 250)
-
Step 800
800
#00518E
oklch(42.8% 0.121 249.9)
-
Step 900
900 (this color)
#00457B
oklch(38.5% 0.109 250.2)
-
Step 950
950
#052847
oklch(27.2% 0.069 249.8)
#00457B 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) | #29497D | 0.032 |
| Deuteranopia (no green cones) | #123F7A | 0.018 |
| Tritanopia (no blue cones) | #00525A | 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°).
- #00457B
#00457B
oklch(38.5% 0.109 250.2)
- #5F3A00
#5F3A00
oklch(38.4% 0.083 70)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes and gradients that use #00457B
These curated palettes and gradients contain exactly #00457B. Open one to see the full color scheme around it.
Gradients
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.006
- Light Navy #155084 ΔE 0.038
- Cobalt #1E488F ΔE 0.040
- Deep Sea Blue #015482 ΔE 0.046
- Marine Blue #01386A ΔE 0.046
- Dusk Blue #26538D ΔE 0.058
- Dark Grey Blue #29465B ΔE 0.061
- Prussian Blue #1D3557 ΔE 0.072
Use #00457B 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.