#045578
Closest named color: Deep Sea Blue (#015482). oklch(42.5% 0.089 235.5), rgb(4, 85, 120).
Aa
White text reads best on this color (8.15:1).
About this color
#045578 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.089 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.018 away. White text reads best on it, at 8.15:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.57:1 |
| White text | 8.15:1 |
Values
| HEX | #045578 |
| RGB | rgb(4, 85, 120) |
| HSL | hsl(198, 94%, 24%) |
| OKLCH | oklch(42.5% 0.089 235.5) |
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 #045578 | 8.15:1 | AAA | Lc -92.4 | Preferred for body text |
| Black text on #045578 | 2.57:1 | Fails | Lc 16.3 | Dividers and decoration only |
| #045578 text on white | 8.15:1 | AAA | Lc 87.7 | Fine for body text |
| #045578 text on black | 2.57:1 | Fails | Lc -14.4 | 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 800.
-
Step 50
50
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1ECF3
oklch(93.7% 0.015 235.4)
-
Step 200
200
#C8DDEA
oklch(88.6% 0.029 234.9)
-
Step 300
300
#A1C7DE
oklch(81% 0.052 234.9)
-
Step 400
400
#6BA9CE
oklch(70.7% 0.084 235.9)
-
Step 500
500
#3E93C1
oklch(63.1% 0.107 235.7)
-
Step 600
600
#0C7DAD
oklch(55.7% 0.115 235)
-
Step 700
700
#006993
oklch(49.2% 0.104 234.9)
-
Step 800
800 (this color)
#045578
oklch(42.5% 0.089 235.5)
-
Step 900
900
#134761
oklch(37.7% 0.069 235)
-
Step 950
950
#0E2A39
oklch(27.1% 0.044 235)
#045578 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) | #44557A | 0.053 |
| Deuteranopia (no green cones) | #354B77 | 0.042 |
| Tritanopia (no blue cones) | #005E61 | 0.055 |
| Achromatopsia (no color) | #4F4F4F | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #045578
#045578
oklch(42.5% 0.089 235.5)
- #734017
#734017
oklch(42.6% 0.089 55.6)
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 #045578, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.018
- Light Navy #155084 ΔE 0.029
- Light Navy Blue #2E5A88 ΔE 0.042
- Dusk Blue #26538D ΔE 0.043
- Petrol #005F6A ΔE 0.045
- Deep Teal #00555A ΔE 0.052
- YInMn Blue #415A77 ΔE 0.052
- Twilight Blue #0A437A ΔE 0.056
Use #045578 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.