#001239
Closest named color: Navy Blue (#001146). oklch(19.8% 0.081 260.1), rgb(0, 18, 57).
Aa
White text reads best on this color (18.33:1).
About this color
#001239 is a very dark, moderately saturated blue. In OKLCH its lightness is 20%, its chroma 0.081 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.025 away. White text reads best on it, at 18.33:1.
| Hue family | Blues |
| Lightness | very dark (20%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.14:1 |
| White text | 18.33:1 |
Values
| HEX | #001239 |
| RGB | rgb(0, 18, 57) |
| HSL | hsl(221, 100%, 11%) |
| OKLCH | oklch(19.8% 0.081 260.1) |
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 #001239 | 18.33:1 | AAA | Lc -106.8 | Preferred for body text |
| Black text on #001239 | 1.14:1 | Fails | Lc 0.0 | Not readable |
| #001239 text on white | 18.33:1 | AAA | Lc 104.6 | Preferred for body text |
| #001239 text on black | 1.14:1 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#DFEBFD
oklch(93.6% 0.028 258.4)
-
Step 200
200
#C5DAFD
oklch(88.4% 0.054 260.6)
-
Step 300
300
#9DC2FF
oklch(81% 0.096 260.2)
-
Step 400
400
#669FFF
oklch(70.7% 0.154 260.3)
-
Step 500
500
#3A84FD
oklch(63.2% 0.195 259.9)
-
Step 600
600
#1469ED
oklch(55.6% 0.213 260.1)
-
Step 700
700
#0456CE
oklch(49% 0.198 260.2)
-
Step 800
800
#0A48A6
oklch(42.8% 0.163 259.9)
-
Step 900
900
#123D84
oklch(37.6% 0.129 260.1)
-
Step 950
950 (this color)
#001239
oklch(19.8% 0.081 260.1)
#001239 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) | #00173A | 0.016 |
| Deuteranopia (no green cones) | #001238 | 0.002 |
| Tritanopia (no blue cones) | #001C23 | 0.061 |
| Achromatopsia (no color) | #151515 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #001239
#001239
oklch(19.8% 0.081 260.1)
- #1F1300
#1F1300
oklch(19.8% 0.041 80.2)
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 #001239, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.025
- Dark Navy #000435 ΔE 0.041
- Night Blue #040348 ΔE 0.042
- Rich Black #0D1B2A ΔE 0.050
- Very Dark Blue #000133 ΔE 0.053
- Dark Navy Blue #00022E ΔE 0.056
- Midnight #03012D ΔE 0.058
- Rich Navy #001219 ΔE 0.066
Use #001239 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.