#013D5D
Closest named color: Prussian Blue (#1D3557). oklch(34.3% 0.078 240.2), rgb(1, 61, 93).
Aa
White text reads best on this color (11.49:1).
About this color
#013D5D is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.078 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.029 away. White text reads best on it, at 11.49:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.82:1 |
| White text | 11.49:1 |
Values
| HEX | #013D5D |
| RGB | rgb(1, 61, 93) |
| HSL | hsl(201, 98%, 18%) |
| OKLCH | oklch(34.3% 0.078 240.2) |
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 #013D5D | 11.49:1 | AAA | Lc -99.8 | Preferred for body text |
| Black text on #013D5D | 1.82:1 | Fails | Lc 7.9 | Not readable |
| #013D5D text on white | 11.49:1 | AAA | Lc 96.0 | Preferred for body text |
| #013D5D text on black | 1.82:1 | 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
#E0ECF4
oklch(93.6% 0.017 236.7)
-
Step 200
200
#C7DDED
oklch(88.6% 0.032 239.4)
-
Step 300
300
#9FC6E3
oklch(80.8% 0.058 240.6)
-
Step 400
400
#67A8D5
oklch(70.6% 0.094 240.2)
-
Step 500
500
#3792CA
oklch(63.1% 0.119 239.9)
-
Step 600
600
#007BB6
oklch(55.6% 0.128 240.2)
-
Step 700
700
#00679A
oklch(49.1% 0.113 240.5)
-
Step 800
800
#00547F
oklch(42.6% 0.099 240.7)
-
Step 900
900 (this color)
#013D5D
oklch(34.3% 0.078 240.2)
-
Step 950
950
#0C293C
oklch(26.9% 0.049 240.9)
#013D5D 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) | #2D3E5E | 0.038 |
| Deuteranopia (no green cones) | #21365C | 0.029 |
| Tritanopia (no blue cones) | #004548 | 0.052 |
| Achromatopsia (no color) | #393939 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #013D5D
#013D5D
oklch(34.3% 0.078 240.2)
- #552D02
#552D02
oklch(34.2% 0.078 60.4)
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 #013D5D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.029
- Midnight Green #073B4C ΔE 0.030
- Marine Blue #01386A ΔE 0.030
- Dark Blue Grey #1F3B4D ΔE 0.032
- Dark Grey Blue #29465B ΔE 0.047
- Marine #042E60 ΔE 0.049
- Charcoal #264653 ΔE 0.049
- Twilight Blue #0A437A ΔE 0.052
Use #013D5D 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.