#001727
Closest named color: Rich Black (#0D1B2A). oklch(19.5% 0.045 240.3), rgb(0, 23, 39).
Aa
White text reads best on this color (18.23:1).
About this color
#001727 is a very dark, muted blue. In OKLCH its lightness is 20%, its chroma 0.045 and its hue 240°. 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 18.23:1.
| Hue family | Blues |
| Lightness | very dark (20%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.15:1 |
| White text | 18.23:1 |
Values
| HEX | #001727 |
| RGB | rgb(0, 23, 39) |
| HSL | hsl(205, 100%, 8%) |
| OKLCH | oklch(19.5% 0.045 240.3) |
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 #001727 | 18.23:1 | AAA | Lc -106.9 | Preferred for body text |
| Black text on #001727 | 1.15:1 | Fails | Lc 0.0 | Not readable |
| #001727 text on white | 18.23:1 | AAA | Lc 104.7 | Preferred for body text |
| #001727 text on black | 1.15:1 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF3
oklch(93.5% 0.015 241.8)
-
Step 200
200
#C8DCEB
oklch(88.4% 0.03 240.2)
-
Step 300
300
#A2C6E0
oklch(80.9% 0.053 239.7)
-
Step 400
400
#6EA8D1
oklch(70.7% 0.085 240.3)
-
Step 500
500
#4391C5
oklch(63% 0.11 240.8)
-
Step 600
600
#1C7BB1
oklch(55.7% 0.118 240.1)
-
Step 700
700
#096798
oklch(49% 0.11 240.2)
-
Step 800
800
#0F547C
oklch(42.6% 0.092 240.8)
-
Step 900
900
#174663
oklch(37.7% 0.071 239.8)
-
Step 950
950 (this color)
#001727
oklch(19.5% 0.045 240.3)
#001727 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) | #0F1728 | 0.022 |
| Deuteranopia (no green cones) | #091327 | 0.018 |
| Tritanopia (no blue cones) | #001B1D | 0.029 |
| Achromatopsia (no color) | #151515 | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #001727
#001727
oklch(19.5% 0.045 240.3)
- #230F00
#230F00
oklch(19.4% 0.045 60.8)
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 #001727, 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 0.032
- Almost Black #070D0D ΔE 0.058
- Navy Blue #001146 ΔE 0.065
- Dark #1B2431 ΔE 0.066
- Dark Navy #000435 ΔE 0.067
- Dark Navy Blue #00022E ΔE 0.074
- Jet #212529 ΔE 0.076
Use #001727 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.