#01375D
Closest named color: Prussian Blue (#1D3557). oklch(32.7% 0.085 246.7), rgb(1, 55, 93).
Aa
White text reads best on this color (12.31:1).
About this color
#01375D is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.085 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.022 away. White text reads best on it, at 12.31:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.70:1 |
| White text | 12.31:1 |
Values
| HEX | #01375D |
| RGB | rgb(1, 55, 93) |
| HSL | hsl(205, 98%, 18%) |
| OKLCH | oklch(32.7% 0.085 246.7) |
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 #01375D | 12.31:1 | AAA | Lc -101.1 | Preferred for body text |
| Black text on #01375D | 1.70:1 | Fails | Lc 0.0 | Not readable |
| #01375D text on white | 12.31:1 | AAA | Lc 97.6 | Preferred for body text |
| #01375D text on black | 1.70:1 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0EBF6
oklch(93.5% 0.019 248)
-
Step 200
200
#C7DCF0
oklch(88.5% 0.036 246.9)
-
Step 300
300
#A0C5E8
oklch(80.9% 0.064 247.2)
-
Step 400
400
#6AA6DC
oklch(70.6% 0.101 246.9)
-
Step 500
500
#3D8FD3
oklch(63.1% 0.13 246.9)
-
Step 600
600
#0D78C0
oklch(55.6% 0.141 246.6)
-
Step 700
700
#0065A4
oklch(49.2% 0.127 246.3)
-
Step 800
800
#065286
oklch(42.6% 0.108 246.8)
-
Step 900
900 (this color)
#01375D
oklch(32.7% 0.085 246.7)
-
Step 950
950
#0D283F
oklch(26.9% 0.054 247.3)
#01375D 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) | #24395F | 0.031 |
| Deuteranopia (no green cones) | #16315C | 0.021 |
| Tritanopia (no blue cones) | #004045 | 0.059 |
| Achromatopsia (no color) | #353535 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #01375D
#01375D
oklch(32.7% 0.085 246.7)
- #4D2C00
#4D2C00
oklch(32.8% 0.073 66.8)
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 #01375D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.022
- Marine Blue #01386A ΔE 0.023
- Marine #042E60 ΔE 0.029
- Midnight Green #073B4C ΔE 0.036
- Dark Blue Grey #1F3B4D ΔE 0.041
- Gunmetal #293241 ΔE 0.057
- Twilight Blue #0A437A ΔE 0.060
- Space Cadet #2B2D42 ΔE 0.061
Use #01375D 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.