#003175
Closest named color: Marine Blue (#01386A). oklch(33.1% 0.127 258.7), rgb(0, 49, 117).
Aa
White text reads best on this color (12.38:1).
About this color
#003175 is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.127 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.029 away. White text reads best on it, at 12.38:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.69:1 |
| White text | 12.38:1 |
Values
| HEX | #003175 |
| RGB | rgb(0, 49, 117) |
| HSL | hsl(215, 100%, 23%) |
| OKLCH | oklch(33.1% 0.127 258.7) |
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 #003175 | 12.38:1 | AAA | Lc -101.0 | Preferred for body text |
| Black text on #003175 | 1.69:1 | Fails | Lc 0.0 | Not readable |
| #003175 text on white | 12.38:1 | AAA | Lc 97.4 | Preferred for body text |
| #003175 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
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DFEBFD
oklch(93.6% 0.028 258.4)
-
Step 200
200
#C4DBFD
oklch(88.5% 0.053 258)
-
Step 300
300
#9BC2FE
oklch(80.8% 0.095 258.8)
-
Step 400
400
#63A0FE
oklch(70.7% 0.152 258.8)
-
Step 500
500
#3585FC
oklch(63.2% 0.194 258.7)
-
Step 600
600
#026AEB
oklch(55.5% 0.211 258.8)
-
Step 700
700
#0059C8
oklch(49.1% 0.188 258.7)
-
Step 800
800
#0149A5
oklch(42.8% 0.161 258.6)
-
Step 900
900 (this color)
#003175
oklch(33.1% 0.127 258.7)
-
Step 950
950
#0B254D
oklch(27% 0.081 259)
#003175 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) | #003A77 | 0.026 |
| Deuteranopia (no green cones) | #003074 | 0.003 |
| Tritanopia (no blue cones) | #00424E | 0.094 |
| Achromatopsia (no color) | #343434 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #003175
#003175
oklch(33.1% 0.127 258.7)
- #493100
#493100
oklch(33.3% 0.069 78.9)
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 #003175, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.029
- Marine #042E60 ΔE 0.037
- Twilight Blue #0A437A ΔE 0.054
- Midnight Blue #191970 ΔE 0.057
- Prussian Blue #1D3557 ΔE 0.059
- Royal #0C1793 ΔE 0.069
- Cobalt #1E488F ΔE 0.083
- Midnight Green #073B4C ΔE 0.084
Use #003175 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.