#013B59
Closest named color: Midnight Green (#073B4C). oklch(33.5% 0.075 239.2), rgb(1, 59, 89).
Aa
White text reads best on this color (11.85:1).
About this color
#013B59 is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.075 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.023 away. White text reads best on it, at 11.85:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.77:1 |
| White text | 11.85:1 |
Values
| HEX | #013B59 |
| RGB | rgb(1, 59, 89) |
| HSL | hsl(200, 98%, 18%) |
| OKLCH | oklch(33.5% 0.075 239.2) |
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 #013B59 | 11.85:1 | AAA | Lc -100.4 | Preferred for body text |
| Black text on #013B59 | 1.77:1 | Fails | Lc 0.0 | Not readable |
| #013B59 text on white | 11.85:1 | AAA | Lc 96.7 | Preferred for body text |
| #013B59 text on black | 1.77:1 | 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
#C7DDEC
oklch(88.6% 0.031 237.6)
-
Step 300
300
#A0C6E2
oklch(80.8% 0.057 240.3)
-
Step 400
400
#69A8D3
oklch(70.6% 0.091 239.7)
-
Step 500
500
#3A92C7
oklch(63.1% 0.115 239)
-
Step 600
600
#027BB4
oklch(55.5% 0.125 239.4)
-
Step 700
700
#006898
oklch(49.2% 0.11 238.7)
-
Step 800
800
#00557E
oklch(42.8% 0.097 239.2)
-
Step 900
900 (this color)
#013B59
oklch(33.5% 0.075 239.2)
-
Step 950
950
#0D293B
oklch(26.9% 0.047 240.1)
#013B59 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) | #2C3B5A | 0.038 |
| Deuteranopia (no green cones) | #213458 | 0.030 |
| Tritanopia (no blue cones) | #004346 | 0.049 |
| Achromatopsia (no color) | #373737 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #013B59
#013B59
oklch(33.5% 0.075 239.2)
- #522C05
#522C05
oklch(33.6% 0.074 59.9)
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 #013B59, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.023
- Prussian Blue #1D3557 ΔE 0.025
- Dark Blue Grey #1F3B4D ΔE 0.029
- Marine Blue #01386A ΔE 0.033
- Marine #042E60 ΔE 0.045
- Dark Grey Blue #29465B ΔE 0.052
- Charcoal #264653 ΔE 0.052
- Gunmetal #293241 ΔE 0.053
Use #013B59 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.