#003574
Closest named color: Marine Blue (#01386A). oklch(34% 0.12 256.9), rgb(0, 53, 116).
Aa
White text reads best on this color (11.92:1).
About this color
#003574 is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.120 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.020 away. White text reads best on it, at 11.92:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.76:1 |
| White text | 11.92:1 |
Values
| HEX | #003574 |
| RGB | rgb(0, 53, 116) |
| HSL | hsl(213, 100%, 23%) |
| OKLCH | oklch(34% 0.12 256.9) |
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 #003574 | 11.92:1 | AAA | Lc -100.3 | Preferred for body text |
| Black text on #003574 | 1.76:1 | Fails | Lc 0.0 | Not readable |
| #003574 text on white | 11.92:1 | AAA | Lc 96.6 | Preferred for body text |
| #003574 text on black | 1.76:1 | 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
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DFEBFC
oklch(93.6% 0.026 257)
-
Step 200
200
#C5DBFB
oklch(88.5% 0.05 257.7)
-
Step 300
300
#9BC3FB
oklch(80.9% 0.091 256.9)
-
Step 400
400
#63A2F9
oklch(70.8% 0.144 256.8)
-
Step 500
500
#3387F6
oklch(63.1% 0.184 257)
-
Step 600
600
#006EE2
oklch(55.6% 0.196 256.8)
-
Step 700
700
#005CC0
oklch(49.1% 0.174 256.9)
-
Step 800
800
#004B9F
oklch(42.7% 0.151 256.9)
-
Step 900
900 (this color)
#003574
oklch(34% 0.12 256.9)
-
Step 950
950
#0A264B
oklch(27.1% 0.076 256.8)
#003574 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) | #063C76 | 0.022 |
| Deuteranopia (no green cones) | #003273 | 0.009 |
| Tritanopia (no blue cones) | #00454F | 0.091 |
| Achromatopsia (no color) | #373737 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #003574
#003574
oklch(34% 0.12 256.9)
- #4C3200
#4C3200
oklch(33.9% 0.071 77.1)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes and gradients that use #003574
These curated palettes and gradients contain exactly #003574. Open one to see the full color scheme around it.
Gradients
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.020
- Marine #042E60 ΔE 0.039
- Twilight Blue #0A437A ΔE 0.043
- Prussian Blue #1D3557 ΔE 0.054
- Midnight Blue #191970 ΔE 0.068
- Cobalt #1E488F ΔE 0.075
- Midnight Green #073B4C ΔE 0.077
- Dark Blue Grey #1F3B4D ΔE 0.077
Use #003574 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.