#01315E
Closest named color: Marine (#042E60). oklch(31.2% 0.093 252.4), rgb(1, 49, 94).
Aa
White text reads best on this color (13.10:1).
About this color
#01315E is a dark, moderately saturated blue. In OKLCH its lightness is 31%, its chroma 0.093 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.010 away. White text reads best on it, at 13.10:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.60:1 |
| White text | 13.10:1 |
Values
| HEX | #01315E |
| RGB | rgb(1, 49, 94) |
| HSL | hsl(209, 98%, 19%) |
| OKLCH | oklch(31.2% 0.093 252.4) |
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 #01315E | 13.10:1 | AAA | Lc -102.2 | Preferred for body text |
| Black text on #01315E | 1.60:1 | Fails | Lc 0.0 | Not readable |
| #01315E text on white | 13.10:1 | AAA | Lc 98.9 | Preferred for body text |
| #01315E text on black | 1.60:1 | 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
#EFF6FF
oklch(97% 0.014 254.6)
-
Step 100
100
#DBECFF
oklch(93.6% 0.032 251.1)
-
Step 200
200
#BFDCFF
oklch(88.5% 0.058 253.3)
-
Step 300
300
#92C5FF
oklch(80.9% 0.099 252.2)
-
Step 400
400
#4FA4FF
oklch(70.8% 0.157 252.3)
-
Step 500
500
#008AF8
oklch(63.2% 0.191 252.4)
-
Step 600
600
#0074D2
oklch(55.7% 0.168 252.4)
-
Step 700
700
#0061B1
oklch(49.1% 0.148 252.3)
-
Step 800
800
#004F93
oklch(42.7% 0.13 252.6)
-
Step 900
900
#00427C
oklch(37.8% 0.114 252.4)
-
Step 950
950 (this color)
#01315E
oklch(31.2% 0.093 252.4)
#01315E 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) | #193560 | 0.024 |
| Deuteranopia (no green cones) | #032D5D | 0.012 |
| Tritanopia (no blue cones) | #003C42 | 0.070 |
| Achromatopsia (no color) | #303030 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #01315E
#01315E
oklch(31.2% 0.093 252.4)
- #452A00
#452A00
oklch(31.1% 0.067 72)
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 #01315E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.010
- Marine Blue #01386A ΔE 0.029
- Prussian Blue #1D3557 ΔE 0.031
- Midnight Green #073B4C ΔE 0.051
- Dark Blue Grey #1F3B4D ΔE 0.056
- Space Cadet #2B2D42 ΔE 0.062
- Gunmetal #293241 ΔE 0.064
- Oxford Blue #1B263B ΔE 0.068
Use #01315E 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.