#013758
Closest named color: Prussian Blue (#1D3557). oklch(32.4% 0.078 243.2), rgb(1, 55, 88).
Aa
White text reads best on this color (12.43:1).
About this color
#013758 is a dark, moderately saturated blue. In OKLCH its lightness is 32%, its chroma 0.078 and its hue 243°. 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 12.43:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.68:1 |
| White text | 12.43:1 |
Values
| HEX | #013758 |
| RGB | rgb(1, 55, 88) |
| HSL | hsl(203, 98%, 17%) |
| OKLCH | oklch(32.4% 0.078 243.2) |
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 #013758 | 12.43:1 | AAA | Lc -101.3 | Preferred for body text |
| Black text on #013758 | 1.68:1 | Fails | Lc 0.0 | Not readable |
| #013758 text on white | 12.43:1 | AAA | Lc 97.8 | Preferred for body text |
| #013758 text on black | 1.68:1 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C8DCED
oklch(88.5% 0.032 243.7)
-
Step 300
300
#A1C6E4
oklch(81% 0.058 243)
-
Step 400
400
#6BA7D6
oklch(70.6% 0.093 243.3)
-
Step 500
500
#3F91CC
oklch(63.2% 0.119 243.2)
-
Step 600
600
#117AB9
oklch(55.7% 0.13 243.2)
-
Step 700
700
#00669E
oklch(49% 0.119 243.2)
-
Step 800
800
#085481
oklch(42.8% 0.1 242.9)
-
Step 900
900 (this color)
#013758
oklch(32.4% 0.078 243.2)
-
Step 950
950
#0E293D
oklch(27.1% 0.05 243.6)
#013758 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) | #273859 | 0.034 |
| Deuteranopia (no green cones) | #1B3157 | 0.024 |
| Tritanopia (no blue cones) | #003F43 | 0.053 |
| Achromatopsia (no color) | #343434 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #013758
#013758
oklch(32.4% 0.078 243.2)
- #4D2A00
#4D2A00
oklch(32.3% 0.073 63.8)
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 #013758, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.021
- Midnight Green #073B4C ΔE 0.028
- Marine Blue #01386A ΔE 0.032
- Marine #042E60 ΔE 0.034
- Dark Blue Grey #1F3B4D ΔE 0.035
- Gunmetal #293241 ΔE 0.051
- Space Cadet #2B2D42 ΔE 0.056
- Dark Grey Blue #29465B ΔE 0.063
Use #013758 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.