#043255
Closest named color: Prussian Blue (#1D3557). oklch(30.9% 0.078 247.6), rgb(4, 50, 85).
Aa
White text reads best on this color (13.18:1).
About this color
#043255 is a dark, moderately saturated blue. In OKLCH its lightness is 31%, its chroma 0.078 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.025 away. White text reads best on it, at 13.18:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.59:1 |
| White text | 13.18:1 |
Values
| HEX | #043255 |
| RGB | rgb(4, 50, 85) |
| HSL | hsl(206, 91%, 17%) |
| OKLCH | oklch(30.9% 0.078 247.6) |
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 #043255 | 13.18:1 | AAA | Lc -102.4 | Preferred for body text |
| Black text on #043255 | 1.59:1 | Fails | Lc 0.0 | Not readable |
| #043255 text on white | 13.18:1 | AAA | Lc 99.1 | Preferred for body text |
| #043255 text on black | 1.59:1 | 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
#DCECFB
oklch(93.6% 0.027 246.3)
-
Step 200
200
#BFDDFA
oklch(88.5% 0.051 247.5)
-
Step 300
300
#90C6FA
oklch(80.8% 0.093 248.1)
-
Step 400
400
#48A7F7
oklch(70.8% 0.147 247.3)
-
Step 500
500
#008EE8
oklch(63% 0.168 247.5)
-
Step 600
600
#0077C4
oklch(55.5% 0.148 247.6)
-
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
#004473
oklch(37.7% 0.1 247.4)
-
Step 950
950 (this color)
#043255
oklch(30.9% 0.078 247.6)
#043255 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) | #213456 | 0.028 |
| Deuteranopia (no green cones) | #142D54 | 0.018 |
| Tritanopia (no blue cones) | #003A3F | 0.054 |
| Achromatopsia (no color) | #303030 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #043255
#043255
oklch(30.9% 0.078 247.6)
- #462800
#462800
oklch(30.8% 0.068 67.6)
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 #043255, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.025
- Marine #042E60 ΔE 0.025
- Midnight Green #073B4C ΔE 0.038
- Marine Blue #01386A ΔE 0.039
- Dark Blue Grey #1F3B4D ΔE 0.045
- Gunmetal #293241 ΔE 0.050
- Space Cadet #2B2D42 ΔE 0.050
- Oxford Blue #1B263B ΔE 0.056
Use #043255 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.