#04456F
Closest named color: Twilight Blue (#0A437A). oklch(37.7% 0.093 245.1), rgb(4, 69, 111).
Aa
White text reads best on this color (10.06:1).
About this color
#04456F is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.093 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.021 away. White text reads best on it, at 10.06:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.08:1 |
| White text | 10.06:1 |
Values
| HEX | #04456F |
| RGB | rgb(4, 69, 111) |
| HSL | hsl(204, 93%, 23%) |
| OKLCH | oklch(37.7% 0.093 245.1) |
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 #04456F | 10.06:1 | AAA | Lc -97.0 | Preferred for body text |
| Black text on #04456F | 2.08:1 | Fails | Lc 11.1 | Not readable |
| #04456F text on white | 10.06:1 | AAA | Lc 92.9 | Preferred for body text |
| #04456F text on black | 2.08:1 | Fails | Lc -9.6 | 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
#F0F6FB
oklch(97% 0.009 242.8)
-
Step 100
100
#DFECF7
oklch(93.7% 0.02 243.4)
-
Step 200
200
#C5DCF2
oklch(88.4% 0.039 247.1)
-
Step 300
300
#9BC6EB
oklch(80.9% 0.07 244.8)
-
Step 400
400
#61A7E1
oklch(70.6% 0.111 245.3)
-
Step 500
500
#2A90D9
oklch(63.1% 0.142 245.1)
-
Step 600
600
#0079BF
oklch(55.7% 0.14 245)
-
Step 700
700
#0065A1
oklch(49% 0.124 245.1)
-
Step 800
800
#005385
oklch(42.7% 0.107 244.8)
-
Step 900
900 (this color)
#04456F
oklch(37.7% 0.093 245.1)
-
Step 950
950
#082941
oklch(27.1% 0.058 244.7)
#04456F 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) | #314771 | 0.038 |
| Deuteranopia (no green cones) | #213E6E | 0.026 |
| Tritanopia (no blue cones) | #004F54 | 0.064 |
| Achromatopsia (no color) | #424242 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #04456F
#04456F
oklch(37.7% 0.093 245.1)
- #603600
#603600
oklch(37.7% 0.085 64.2)
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 #04456F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.021
- Marine Blue #01386A ΔE 0.041
- Dark Grey Blue #29465B ΔE 0.043
- Light Navy #155084 ΔE 0.048
- Deep Sea Blue #015482 ΔE 0.052
- Charcoal #264653 ΔE 0.053
- Cobalt #1E488F ΔE 0.058
- Prussian Blue #1D3557 ΔE 0.058
Use #04456F 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.