#01172E
Closest named color: Rich Black (#0D1B2A). oklch(20.1% 0.055 250.3), rgb(1, 23, 46).
Aa
White text reads best on this color (18.05:1).
About this color
#01172E is a very dark, muted blue. In OKLCH its lightness is 20%, its chroma 0.055 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.025 away. White text reads best on it, at 18.05:1.
| Hue family | Blues |
| Lightness | very dark (20%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.16:1 |
| White text | 18.05:1 |
Values
| HEX | #01172E |
| RGB | rgb(1, 23, 46) |
| HSL | hsl(211, 96%, 9%) |
| OKLCH | oklch(20.1% 0.055 250.3) |
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 #01172E | 18.05:1 | AAA | Lc -106.8 | Preferred for body text |
| Black text on #01172E | 1.16:1 | Fails | Lc 0.0 | Not readable |
| #01172E text on white | 18.05:1 | AAA | Lc 104.6 | Preferred for body text |
| #01172E text on black | 1.16:1 | 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 950.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C8DCF1
oklch(88.6% 0.036 249.5)
-
Step 300
300
#A2C4EA
oklch(80.9% 0.065 251.5)
-
Step 400
400
#6DA5DF
oklch(70.7% 0.104 250.3)
-
Step 500
500
#438DD6
oklch(63% 0.133 250.5)
-
Step 600
600
#1E76C4
oklch(55.6% 0.145 250.5)
-
Step 700
700
#0D63A9
oklch(49.2% 0.134 250.2)
-
Step 800
800
#115189
oklch(42.7% 0.111 250.3)
-
Step 900
900
#17436E
oklch(37.6% 0.088 251)
-
Step 950
950 (this color)
#01172E
oklch(20.1% 0.055 250.3)
#01172E 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) | #0B192F | 0.017 |
| Deuteranopia (no green cones) | #04142E | 0.011 |
| Tritanopia (no blue cones) | #001D20 | 0.041 |
| Achromatopsia (no color) | #161616 | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #01172E
#01172E
oklch(20.1% 0.055 250.3)
- #231200
#231200
oklch(20.2% 0.044 69)
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 #01172E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.025
- Rich Navy #001219 ΔE 0.045
- Navy Blue #001146 ΔE 0.051
- Dark Navy #000435 ΔE 0.061
- Dark #1B2431 ΔE 0.063
- Oxford Blue #1B263B ΔE 0.070
- Almost Black #070D0D ΔE 0.070
- Night Blue #040348 ΔE 0.070
Use #01172E 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.