#033151
Closest named color: Prussian Blue (#1D3557). oklch(30.3% 0.074 245.5), rgb(3, 49, 81).
Aa
White text reads best on this color (13.44:1).
About this color
#033151 is a dark, moderately saturated blue. In OKLCH its lightness is 30%, its chroma 0.074 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.029 away. White text reads best on it, at 13.44:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.56:1 |
| White text | 13.44:1 |
Values
| HEX | #033151 |
| RGB | rgb(3, 49, 81) |
| HSL | hsl(205, 93%, 16%) |
| OKLCH | oklch(30.3% 0.074 245.5) |
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 #033151 | 13.44:1 | AAA | Lc -102.7 | Preferred for body text |
| Black text on #033151 | 1.56:1 | Fails | Lc 0.0 | Not readable |
| #033151 text on white | 13.44:1 | AAA | Lc 99.5 | Preferred for body text |
| #033151 text on black | 1.56:1 | 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
#EFF6FD
oklch(97% 0.012 248)
-
Step 100
100
#DDECFA
oklch(93.6% 0.025 246.2)
-
Step 200
200
#BFDDF8
oklch(88.4% 0.049 245.6)
-
Step 300
300
#91C7F6
oklch(80.9% 0.087 245.4)
-
Step 400
400
#49A8F2
oklch(70.7% 0.14 245.3)
-
Step 500
500
#0090E3
oklch(63.2% 0.16 245.3)
-
Step 600
600
#0079C0
oklch(55.7% 0.141 245.3)
-
Step 700
700
#0065A2
oklch(49% 0.125 245.5)
-
Step 800
800
#005386
oklch(42.8% 0.108 245.3)
-
Step 900
900
#004571
oklch(37.8% 0.096 245.5)
-
Step 950
950 (this color)
#033151
oklch(30.3% 0.074 245.5)
#033151 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) | #223252 | 0.030 |
| Deuteranopia (no green cones) | #162C50 | 0.020 |
| Tritanopia (no blue cones) | #00393D | 0.052 |
| Achromatopsia (no color) | #2F2F2F | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #033151
#033151
oklch(30.3% 0.074 245.5)
- #452600
#452600
oklch(30.2% 0.068 65.3)
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 #033151, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.029
- Marine #042E60 ΔE 0.030
- Midnight Green #073B4C ΔE 0.038
- Dark Blue Grey #1F3B4D ΔE 0.046
- Marine Blue #01386A ΔE 0.047
- Gunmetal #293241 ΔE 0.048
- Space Cadet #2B2D42 ΔE 0.048
- Oxford Blue #1B263B ΔE 0.049
Use #033151 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.