#04355A
Closest named color: Prussian Blue (#1D3557). oklch(32% 0.082 247.7), rgb(4, 53, 90).
Aa
White text reads best on this color (12.63:1).
About this color
#04355A is a dark, moderately saturated blue. In OKLCH its lightness is 32%, its chroma 0.082 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.020 away. White text reads best on it, at 12.63:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.66:1 |
| White text | 12.63:1 |
Values
| HEX | #04355A |
| RGB | rgb(4, 53, 90) |
| HSL | hsl(206, 91%, 18%) |
| OKLCH | oklch(32% 0.082 247.7) |
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 #04355A | 12.63:1 | AAA | Lc -101.6 | Preferred for body text |
| Black text on #04355A | 1.66:1 | Fails | Lc 0.0 | Not readable |
| #04355A text on white | 12.63:1 | AAA | Lc 98.2 | Preferred for body text |
| #04355A text on black | 1.66:1 | Fails | Lc 0.0 | 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 950.
-
Step 50
50
#EFF6FE
oklch(97% 0.013 251.6)
-
Step 100
100
#DCECFC
oklch(93.6% 0.028 248.1)
-
Step 200
200
#BEDDFC
oklch(88.5% 0.054 248.4)
-
Step 300
300
#8EC7FC
oklch(81% 0.096 247.3)
-
Step 400
400
#42A7FB
oklch(70.8% 0.154 247.4)
-
Step 500
500
#008EE9
oklch(63.1% 0.169 247.8)
-
Step 600
600
#0077C5
oklch(55.6% 0.149 247.9)
-
Step 700
700
#0064A6
oklch(49.1% 0.131 247.6)
-
Step 800
800
#005289
oklch(42.7% 0.113 247.3)
-
Step 900
900
#004474
oklch(37.7% 0.101 247.8)
-
Step 950
950 (this color)
#04355A
oklch(32% 0.082 247.7)
#04355A 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) | #23375C | 0.029 |
| Deuteranopia (no green cones) | #163059 | 0.018 |
| Tritanopia (no blue cones) | #003E43 | 0.058 |
| Achromatopsia (no color) | #333333 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #04355A
#04355A
oklch(32% 0.082 247.7)
- #4A2B00
#4A2B00
oklch(32.1% 0.07 68.2)
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 #04355A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.020
- Marine #042E60 ΔE 0.026
- Marine Blue #01386A ΔE 0.028
- Midnight Green #073B4C ΔE 0.036
- Dark Blue Grey #1F3B4D ΔE 0.041
- Gunmetal #293241 ΔE 0.053
- Space Cadet #2B2D42 ΔE 0.056
- Oxford Blue #1B263B ΔE 0.066
Use #04355A 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.