#00457D
Closest named color: Twilight Blue (#0A437A). oklch(38.6% 0.112 251), rgb(0, 69, 125).
Aa
White text reads best on this color (9.77:1).
About this color
#00457D is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.112 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.007 away. White text reads best on it, at 9.77:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.14:1 |
| White text | 9.77:1 |
Values
| HEX | #00457D |
| RGB | rgb(0, 69, 125) |
| HSL | hsl(207, 100%, 25%) |
| OKLCH | oklch(38.6% 0.112 251) |
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 #00457D | 9.77:1 | AAA | Lc -96.3 | Preferred for body text |
| Black text on #00457D | 2.14:1 | Fails | Lc 11.9 | Not readable |
| #00457D text on white | 9.77:1 | AAA | Lc 92.1 | Preferred for body text |
| #00457D text on black | 2.14:1 | Fails | Lc -10.3 | 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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DEEBFA
oklch(93.5% 0.025 251.9)
-
Step 200
200
#C3DCF8
oklch(88.5% 0.047 251.3)
-
Step 300
300
#98C5F6
oklch(80.9% 0.085 251)
-
Step 400
400
#5BA5F1
oklch(70.7% 0.134 250.8)
-
Step 500
500
#1D8CEC
oklch(63.1% 0.171 250.8)
-
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)
#00457D
oklch(38.6% 0.112 251)
-
Step 950
950
#052748
oklch(27% 0.072 251.7)
#00457D 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) | #27497F | 0.030 |
| Deuteranopia (no green cones) | #0E3F7C | 0.017 |
| Tritanopia (no blue cones) | #00535B | 0.082 |
| Achromatopsia (no color) | #444444 | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00457D
#00457D
oklch(38.6% 0.112 251)
- #5F3B00
#5F3B00
oklch(38.6% 0.083 71.3)
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 #00457D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.007
- Cobalt #1E488F ΔE 0.037
- Light Navy #155084 ΔE 0.037
- Deep Sea Blue #015482 ΔE 0.046
- Marine Blue #01386A ΔE 0.048
- Dusk Blue #26538D ΔE 0.056
- Dark Grey Blue #29465B ΔE 0.064
- Prussian Blue #1D3557 ΔE 0.074
Use #00457D 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.