#043453
Closest named color: Prussian Blue (#1D3557). oklch(31.3% 0.073 243.8), rgb(4, 52, 83).
Aa
White text reads best on this color (12.95:1).
About this color
#043453 is a dark, moderately saturated blue. In OKLCH its lightness is 31%, its chroma 0.073 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.023 away. White text reads best on it, at 12.95:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.62:1 |
| White text | 12.95:1 |
Values
| HEX | #043453 |
| RGB | rgb(4, 52, 83) |
| HSL | hsl(204, 91%, 17%) |
| OKLCH | oklch(31.3% 0.073 243.8) |
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 #043453 | 12.95:1 | AAA | Lc -102.1 | Preferred for body text |
| Black text on #043453 | 1.62:1 | Fails | Lc 0.0 | Not readable |
| #043453 text on white | 12.95:1 | AAA | Lc 98.8 | Preferred for body text |
| #043453 text on black | 1.62:1 | 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
#EFF7FD
oklch(97.2% 0.012 239.9)
-
Step 100
100
#DCECFA
oklch(93.5% 0.026 244.4)
-
Step 200
200
#BFDDF7
oklch(88.4% 0.048 244.5)
-
Step 300
300
#90C7F5
oklch(80.8% 0.087 244.4)
-
Step 400
400
#46A9F0
oklch(70.8% 0.139 243.5)
-
Step 500
500
#0091DF
oklch(63.2% 0.154 243.6)
-
Step 600
600
#0079BC
oklch(55.5% 0.136 243.9)
-
Step 700
700
#00669F
oklch(49.1% 0.12 243.6)
-
Step 800
800
#005383
oklch(42.6% 0.105 243.8)
-
Step 900
900
#00456E
oklch(37.6% 0.092 243.7)
-
Step 950
950 (this color)
#043453
oklch(31.3% 0.073 243.8)
#043453 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) | #253554 | 0.031 |
| Deuteranopia (no green cones) | #1A2E52 | 0.024 |
| Tritanopia (no blue cones) | #003C3F | 0.052 |
| Achromatopsia (no color) | #313131 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #043453
#043453
oklch(31.3% 0.073 243.8)
- #492800
#492800
oklch(31.3% 0.07 64.5)
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 #043453, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.023
- Midnight Green #073B4C ΔE 0.030
- Marine #042E60 ΔE 0.033
- Dark Blue Grey #1F3B4D ΔE 0.038
- Marine Blue #01386A ΔE 0.041
- Gunmetal #293241 ΔE 0.046
- Space Cadet #2B2D42 ΔE 0.049
- Oxford Blue #1B263B ΔE 0.057
Use #043453 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.