#013770
Closest named color: Marine Blue (#01386A). oklch(34.2% 0.111 255), rgb(1, 55, 112).
Aa
White text reads best on this color (11.78:1).
About this color
#013770 is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.111 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.011 away. White text reads best on it, at 11.78:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.78:1 |
| White text | 11.78:1 |
Values
| HEX | #013770 |
| RGB | rgb(1, 55, 112) |
| HSL | hsl(211, 98%, 22%) |
| OKLCH | oklch(34.2% 0.111 255) |
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 #013770 | 11.78:1 | AAA | Lc -100.1 | Preferred for body text |
| Black text on #013770 | 1.78:1 | Fails | Lc 7.4 | Not readable |
| #013770 text on white | 11.78:1 | AAA | Lc 96.4 | Preferred for body text |
| #013770 text on black | 1.78:1 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#DFEBFA
oklch(93.6% 0.024 254)
-
Step 200
200
#C5DBF8
oklch(88.4% 0.047 255.4)
-
Step 300
300
#9CC4F6
oklch(80.9% 0.083 254.3)
-
Step 400
400
#64A3F2
oklch(70.7% 0.134 254.9)
-
Step 500
500
#3589ED
oklch(63% 0.17 255.1)
-
Step 600
600
#0071DB
oklch(55.7% 0.183 255)
-
Step 700
700
#005EB9
oklch(49% 0.162 255.1)
-
Step 800
800
#004D99
oklch(42.7% 0.14 255)
-
Step 900
900 (this color)
#013770
oklch(34.2% 0.111 255)
-
Step 950
950
#0B2648
oklch(26.9% 0.071 255.8)
#013770 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) | #143D72 | 0.023 |
| Deuteranopia (no green cones) | #00336F | 0.012 |
| Tritanopia (no blue cones) | #00454E | 0.083 |
| Achromatopsia (no color) | #383838 | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #013770
#013770
oklch(34.2% 0.111 255)
- #4E3200
#4E3200
oklch(34.2% 0.072 74.9)
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 #013770, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.011
- Marine #042E60 ΔE 0.037
- Twilight Blue #0A437A ΔE 0.040
- Prussian Blue #1D3557 ΔE 0.046
- Midnight Green #073B4C ΔE 0.068
- Dark Blue Grey #1F3B4D ΔE 0.068
- Midnight Blue #191970 ΔE 0.074
- Cobalt #1E488F ΔE 0.075
Use #013770 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.