#001231
Closest named color: Navy Blue (#001146). oklch(18.9% 0.068 257.3), rgb(0, 18, 49).
Aa
White text reads best on this color (18.56:1).
About this color
#001231 is a very dark, muted blue. In OKLCH its lightness is 19%, its chroma 0.068 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.041 away. White text reads best on it, at 18.56:1.
| Hue family | Blues |
| Lightness | very dark (19%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.13:1 |
| White text | 18.56:1 |
Values
| HEX | #001231 |
| RGB | rgb(0, 18, 49) |
| HSL | hsl(218, 100%, 10%) |
| OKLCH | oklch(18.9% 0.068 257.3) |
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 #001231 | 18.56:1 | AAA | Lc -107.0 | Preferred for body text |
| Black text on #001231 | 1.13:1 | Fails | Lc 0.0 | Not readable |
| #001231 text on white | 18.56:1 | AAA | Lc 104.9 | Preferred for body text |
| #001231 text on black | 1.13:1 | 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
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C7DBF7
oklch(88.5% 0.044 256.8)
-
Step 300
300
#A0C3F5
oklch(80.9% 0.081 257.3)
-
Step 400
400
#6BA2F0
oklch(70.7% 0.129 257.2)
-
Step 500
500
#4188EB
oklch(63.1% 0.165 257.3)
-
Step 600
600
#1E6FD9
oklch(55.5% 0.179 257.4)
-
Step 700
700
#0F5DBC
oklch(49.2% 0.165 257.1)
-
Step 800
800
#114C98
oklch(42.6% 0.138 257.3)
-
Step 900
900
#174079
oklch(37.6% 0.107 257.5)
-
Step 950
950 (this color)
#001231
oklch(18.9% 0.068 257.3)
#001231 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) | #001632 | 0.014 |
| Deuteranopia (no green cones) | #001130 | 0.004 |
| Tritanopia (no blue cones) | #001A1F | 0.051 |
| Achromatopsia (no color) | #131313 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #001231
#001231
oklch(18.9% 0.068 257.3)
- #1D1100
#1D1100
oklch(18.9% 0.039 78.4)
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 #001231, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.041
- Dark Navy #000435 ΔE 0.041
- Rich Black #0D1B2A ΔE 0.043
- Rich Navy #001219 ΔE 0.050
- Dark Navy Blue #00022E ΔE 0.052
- Very Dark Blue #000133 ΔE 0.052
- Midnight #03012D ΔE 0.054
- Night Blue #040348 ΔE 0.054
Use #001231 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.