#001031
Closest named color: Dark Navy (#000435). oklch(18.4% 0.071 258.9), rgb(0, 16, 49).
Aa
White text reads best on this color (18.77:1).
About this color
#001031 is a very dark, moderately saturated blue. In OKLCH its lightness is 18%, its chroma 0.071 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Navy (#000435), ΔE 0.035 away. White text reads best on it, at 18.77:1.
| Hue family | Blues |
| Lightness | very dark (18%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Dark Navy (#000435) |
| Black text | 1.11:1 |
| White text | 18.77:1 |
Values
| HEX | #001031 |
| RGB | rgb(0, 16, 49) |
| HSL | hsl(220, 100%, 10%) |
| OKLCH | oklch(18.4% 0.071 258.9) |
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 #001031 | 18.77:1 | AAA | Lc -107.1 | Preferred for body text |
| Black text on #001031 | 1.11:1 | Fails | Lc 0.0 | Not readable |
| #001031 text on white | 18.77:1 | AAA | Lc 105.0 | Preferred for body text |
| #001031 text on black | 1.11:1 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFB
oklch(93.7% 0.025 257.6)
-
Step 200
200
#C7DBF9
oklch(88.6% 0.047 258.4)
-
Step 300
300
#A0C2F7
oklch(80.8% 0.084 259.1)
-
Step 400
400
#6CA1F4
oklch(70.8% 0.135 259.1)
-
Step 500
500
#4387EF
oklch(63.2% 0.171 258.8)
-
Step 600
600
#216DDE
oklch(55.5% 0.188 259)
-
Step 700
700
#135BC1
oklch(49.2% 0.174 258.8)
-
Step 800
800
#144B9C
oklch(42.8% 0.144 258.9)
-
Step 900
900
#183F7C
oklch(37.6% 0.113 259.2)
-
Step 950
950 (this color)
#001031
oklch(18.4% 0.071 258.9)
#001031 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) | #001432 | 0.013 |
| Deuteranopia (no green cones) | #000F30 | 0.004 |
| Tritanopia (no blue cones) | #00181E | 0.052 |
| Achromatopsia (no color) | #121212 | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #001031
#001031
oklch(18.4% 0.071 258.9)
- #1B1000
#1B1000
oklch(18.3% 0.038 79.9)
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 #001031, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Navy #000435 ΔE 0.035
- Navy Blue #001146 ΔE 0.041
- Dark Navy Blue #00022E ΔE 0.046
- Very Dark Blue #000133 ΔE 0.046
- Midnight #03012D ΔE 0.048
- Rich Black #0D1B2A ΔE 0.050
- Night Blue #040348 ΔE 0.051
- Rich Navy #001219 ΔE 0.052
Use #001031 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.