#003451
Closest named color: Prussian Blue (#1D3557). oklch(31% 0.072 240.7), rgb(0, 52, 81).
Aa
White text reads best on this color (13.04:1).
About this color
#003451 is a dark, moderately saturated blue. In OKLCH its lightness is 31%, its chroma 0.072 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.027 away. White text reads best on it, at 13.04:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.61:1 |
| White text | 13.04:1 |
Values
| HEX | #003451 |
| RGB | rgb(0, 52, 81) |
| HSL | hsl(201, 100%, 16%) |
| OKLCH | oklch(31% 0.072 240.7) |
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 #003451 | 13.04:1 | AAA | Lc -102.2 | Preferred for body text |
| Black text on #003451 | 1.61:1 | Fails | Lc 0.0 | Not readable |
| #003451 text on white | 13.04:1 | AAA | Lc 98.9 | Preferred for body text |
| #003451 text on black | 1.61:1 | 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
#DCECF9
oklch(93.5% 0.025 242.3)
-
Step 200
200
#BEDEF6
oklch(88.5% 0.047 240.5)
-
Step 300
300
#8EC8F3
oklch(80.9% 0.086 241.2)
-
Step 400
400
#41AAED
oklch(70.7% 0.136 240.9)
-
Step 500
500
#0092D9
oklch(63.1% 0.147 241)
-
Step 600
600
#007BB7
oklch(55.7% 0.129 240.7)
-
Step 700
700
#00679B
oklch(49.1% 0.115 241)
-
Step 800
800
#005480
oklch(42.6% 0.1 241.3)
-
Step 900
900
#00466B
oklch(37.7% 0.087 240.8)
-
Step 950
950 (this color)
#003451
oklch(31% 0.072 240.7)
#003451 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) | #263552 | 0.035 |
| Deuteranopia (no green cones) | #1B2E50 | 0.026 |
| Tritanopia (no blue cones) | #003B3E | 0.048 |
| Achromatopsia (no color) | #313131 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #003451
#003451
oklch(31% 0.072 240.7)
- #4A2600
#4A2600
oklch(31% 0.072 60.6)
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 #003451, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.027
- Midnight Green #073B4C ΔE 0.028
- Marine #042E60 ΔE 0.036
- Dark Blue Grey #1F3B4D ΔE 0.038
- Marine Blue #01386A ΔE 0.045
- Gunmetal #293241 ΔE 0.045
- Space Cadet #2B2D42 ΔE 0.049
- Oxford Blue #1B263B ΔE 0.055
Use #003451 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.