#01375C
Closest named color: Prussian Blue (#1D3557). oklch(32.6% 0.083 246), rgb(1, 55, 92).
Aa
White text reads best on this color (12.33:1).
About this color
#01375C is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.083 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.021 away. White text reads best on it, at 12.33:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.70:1 |
| White text | 12.33:1 |
Values
| HEX | #01375C |
| RGB | rgb(1, 55, 92) |
| HSL | hsl(204, 98%, 18%) |
| OKLCH | oklch(32.6% 0.083 246) |
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 #01375C | 12.33:1 | AAA | Lc -101.1 | Preferred for body text |
| Black text on #01375C | 1.70:1 | Fails | Lc 0.0 | Not readable |
| #01375C text on white | 12.33:1 | AAA | Lc 97.6 | Preferred for body text |
| #01375C 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
#C7DCEF
oklch(88.5% 0.035 245.5)
-
Step 300
300
#A0C5E7
oklch(80.8% 0.062 246.4)
-
Step 400
400
#6AA7DB
oklch(70.8% 0.099 245.5)
-
Step 500
500
#3D8FD1
oklch(63% 0.127 246.1)
-
Step 600
600
#0E78BF
oklch(55.5% 0.139 246.3)
-
Step 700
700
#0065A3
oklch(49.1% 0.126 245.9)
-
Step 800
800
#065385
oklch(42.8% 0.106 245.6)
-
Step 900
900 (this color)
#01375C
oklch(32.6% 0.083 246)
-
Step 950
950
#0D283E
oklch(26.8% 0.053 246.1)
#01375C 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) | #25395E | 0.032 |
| Deuteranopia (no green cones) | #17315B | 0.022 |
| Tritanopia (no blue cones) | #004045 | 0.058 |
| Achromatopsia (no color) | #353535 | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #01375C
#01375C
oklch(32.6% 0.083 246)
- #4D2B00
#4D2B00
oklch(32.5% 0.073 65.3)
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 #01375C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.021
- Marine Blue #01386A ΔE 0.025
- Marine #042E60 ΔE 0.030
- Midnight Green #073B4C ΔE 0.035
- Dark Blue Grey #1F3B4D ΔE 0.039
- Gunmetal #293241 ΔE 0.056
- Space Cadet #2B2D42 ΔE 0.060
- Twilight Blue #0A437A ΔE 0.061
Use #01375C 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.