#104578
Closest named color: Twilight Blue (#0A437A). oklch(38.6% 0.102 251.8), rgb(16, 69, 120).
Aa
White text reads best on this color (9.79:1).
About this color
#104578 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.102 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.008 away. White text reads best on it, at 9.79:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.14:1 |
| White text | 9.79:1 |
Values
| HEX | #104578 |
| RGB | rgb(16, 69, 120) |
| HSL | hsl(209, 76%, 27%) |
| OKLCH | oklch(38.6% 0.102 251.8) |
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 #104578 | 9.79:1 | AAA | Lc -96.5 | Preferred for body text |
| Black text on #104578 | 2.14:1 | Fails | Lc 11.6 | Not readable |
| #104578 text on white | 9.79:1 | AAA | Lc 92.3 | Preferred for body text |
| #104578 text on black | 2.14:1 | Fails | Lc -10.1 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C5DCF5
oklch(88.5% 0.042 250.5)
-
Step 300
300
#9DC4F1
oklch(80.8% 0.076 252.3)
-
Step 400
400
#65A5EA
oklch(70.8% 0.121 251.5)
-
Step 500
500
#348CE4
oklch(63.1% 0.156 251.8)
-
Step 600
600
#0074D0
oklch(55.6% 0.166 251.9)
-
Step 700
700
#0061B0
oklch(49% 0.147 252)
-
Step 800
800
#005091
oklch(42.8% 0.126 251.5)
-
Step 900
900 (this color)
#104578
oklch(38.6% 0.102 251.8)
-
Step 950
950
#0A2745
oklch(26.9% 0.066 252.2)
#104578 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) | #2C497A | 0.029 |
| Deuteranopia (no green cones) | #1A3F77 | 0.018 |
| Tritanopia (no blue cones) | #005158 | 0.075 |
| Achromatopsia (no color) | #444444 | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #104578
#104578
oklch(38.6% 0.102 251.8)
- #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 #104578, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.008
- Light Navy #155084 ΔE 0.037
- Cobalt #1E488F ΔE 0.041
- Deep Sea Blue #015482 ΔE 0.045
- Marine Blue #01386A ΔE 0.046
- Dark Grey Blue #29465B ΔE 0.054
- Dusk Blue #26538D ΔE 0.056
- Charcoal #264653 ΔE 0.066
Use #104578 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.