#01172F
Closest named color: Rich Black (#0D1B2A). oklch(20.2% 0.057 251.2), rgb(1, 23, 47).
Aa
White text reads best on this color (18.02:1).
About this color
#01172F is a very dark, muted blue. In OKLCH its lightness is 20%, its chroma 0.057 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.026 away. White text reads best on it, at 18.02:1.
| Hue family | Blues |
| Lightness | very dark (20%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.16:1 |
| White text | 18.02:1 |
Values
| HEX | #01172F |
| RGB | rgb(1, 23, 47) |
| HSL | hsl(211, 96%, 9%) |
| OKLCH | oklch(20.2% 0.057 251.2) |
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 #01172F | 18.02:1 | AAA | Lc -106.8 | Preferred for body text |
| Black text on #01172F | 1.16:1 | Fails | Lc 0.0 | Not readable |
| #01172F text on white | 18.02:1 | AAA | Lc 104.5 | Preferred for body text |
| #01172F 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
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C8DBF2
oklch(88.4% 0.038 253.2)
-
Step 300
300
#A1C4EB
oklch(80.8% 0.067 251.4)
-
Step 400
400
#6DA5E1
oklch(70.7% 0.106 251.1)
-
Step 500
500
#428DD9
oklch(63.1% 0.137 251.1)
-
Step 600
600
#1D75C6
oklch(55.5% 0.148 251.4)
-
Step 700
700
#0C62AB
oklch(49% 0.138 251.2)
-
Step 800
800
#10508B
oklch(42.6% 0.115 251.5)
-
Step 900
900
#17436F
oklch(37.7% 0.089 251.5)
-
Step 950
950 (this color)
#01172F
oklch(20.2% 0.057 251.2)
#01172F 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) | #0B1930 | 0.016 |
| Deuteranopia (no green cones) | #03142F | 0.010 |
| Tritanopia (no blue cones) | #001D20 | 0.042 |
| Achromatopsia (no color) | #161616 | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #01172F
#01172F
oklch(20.2% 0.057 251.2)
- #231300
#231300
oklch(20.4% 0.044 71.8)
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 #01172F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.026
- Rich Navy #001219 ΔE 0.047
- Navy Blue #001146 ΔE 0.049
- Dark Navy #000435 ΔE 0.060
- Dark #1B2431 ΔE 0.063
- Night Blue #040348 ΔE 0.068
- Oxford Blue #1B263B ΔE 0.069
- Dark Navy Blue #00022E ΔE 0.070
Use #01172F 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.