#033758
Closest named color: Prussian Blue (#1D3557). oklch(32.4% 0.077 243.8), rgb(3, 55, 88).
Aa
White text reads best on this color (12.41:1).
About this color
#033758 is a dark, moderately saturated blue. In OKLCH its lightness is 32%, its chroma 0.077 and its hue 244°. 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 12.41:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.69:1 |
| White text | 12.41:1 |
Values
| HEX | #033758 |
| RGB | rgb(3, 55, 88) |
| HSL | hsl(203, 93%, 18%) |
| OKLCH | oklch(32.4% 0.077 243.8) |
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 #033758 | 12.41:1 | AAA | Lc -101.3 | Preferred for body text |
| Black text on #033758 | 1.69:1 | Fails | Lc 0.0 | Not readable |
| #033758 text on white | 12.41:1 | AAA | Lc 97.8 | Preferred for body text |
| #033758 text on black | 1.69:1 | 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 900.
-
Step 50
50
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF4
oklch(93.5% 0.016 245.1)
-
Step 200
200
#C8DCED
oklch(88.5% 0.032 243.7)
-
Step 300
300
#A1C6E4
oklch(81% 0.058 243)
-
Step 400
400
#6CA7D6
oklch(70.6% 0.093 243.7)
-
Step 500
500
#4190CB
oklch(63% 0.118 243.9)
-
Step 600
600
#1779B8
oklch(55.5% 0.129 243.9)
-
Step 700
700
#03669F
oklch(49.1% 0.12 243.9)
-
Step 800
800
#0C5381
oklch(42.6% 0.1 244.3)
-
Step 900
900 (this color)
#033758
oklch(32.4% 0.077 243.8)
-
Step 950
950
#0E293C
oklch(27% 0.048 242.2)
#033758 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) | #273859 | 0.033 |
| Deuteranopia (no green cones) | #1B3157 | 0.024 |
| Tritanopia (no blue cones) | #003F43 | 0.053 |
| Achromatopsia (no color) | #343434 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #033758
#033758
oklch(32.4% 0.077 243.8)
- #4D2A00
#4D2A00
oklch(32.3% 0.073 63.8)
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 #033758, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.020
- Midnight Green #073B4C ΔE 0.028
- Marine Blue #01386A ΔE 0.032
- Marine #042E60 ΔE 0.034
- Dark Blue Grey #1F3B4D ΔE 0.034
- Gunmetal #293241 ΔE 0.050
- Space Cadet #2B2D42 ΔE 0.055
- Dark Grey Blue #29465B ΔE 0.063
Use #033758 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.