#191B2C
Closest named color: Rich Black (#0D1B2A). oklch(22.9% 0.033 278.3), rgb(25, 27, 44).
Aa
White text reads best on this color (17.01:1).
About this color
#191B2C is a very dark, muted blue. In OKLCH its lightness is 23%, its chroma 0.033 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.020 away. White text reads best on it, at 17.01:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | muted (0.033) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.23:1 |
| White text | 17.01:1 |
Values
| HEX | #191B2C |
| RGB | rgb(25, 27, 44) |
| HSL | hsl(234, 28%, 14%) |
| OKLCH | oklch(22.9% 0.033 278.3) |
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 #191B2C | 17.01:1 | AAA | Lc -106.3 | Preferred for body text |
| Black text on #191B2C | 1.23:1 | Fails | Lc 0.0 | Not readable |
| #191B2C text on white | 17.01:1 | AAA | Lc 103.9 | Preferred for body text |
| #191B2C text on black | 1.23:1 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E8E9F2
oklch(93.6% 0.012 281.1)
-
Step 200
200
#D5D8E8
oklch(88.5% 0.022 277.5)
-
Step 300
300
#BABFDA
oklch(80.9% 0.038 277.2)
-
Step 400
400
#979DC8
oklch(70.6% 0.063 278.5)
-
Step 500
500
#7E85BA
oklch(63.2% 0.08 278)
-
Step 600
600
#686EA6
oklch(55.7% 0.087 278.5)
-
Step 700
700
#565C8E
oklch(49.2% 0.08 277.8)
-
Step 800
800
#474B73
oklch(42.7% 0.066 278.8)
-
Step 900
900
#3B3F5D
oklch(37.7% 0.052 277.8)
-
Step 950
950 (this color)
#191B2C
oklch(22.9% 0.033 278.3)
#191B2C 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) | #161D2D | 0.008 |
| Deuteranopia (no green cones) | #151C2C | 0.007 |
| Tritanopia (no blue cones) | #141E21 | 0.029 |
| Achromatopsia (no color) | #1C1C1C | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #191B2C
#191B2C
oklch(22.9% 0.033 278.3)
- #211D09
#211D09
oklch(23% 0.034 98.2)
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 #191B2C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.020
- Dark #1B2431 ΔE 0.032
- Jet #212529 ΔE 0.042
- Oxford Blue #1B263B ΔE 0.043
- Rich Navy #001219 ΔE 0.067
- Navy Blue #001146 ΔE 0.073
- Space Cadet #2B2D42 ΔE 0.076
- Very Dark Purple #2A0134 ΔE 0.079
Use #191B2C 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.