#191A37
Closest named color: Rich Black (#0D1B2A). oklch(23.4% 0.055 279.7), rgb(25, 26, 55).
Aa
White text reads best on this color (16.87:1).
About this color
#191A37 is a very dark, muted blue. In OKLCH its lightness is 23%, its chroma 0.055 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.033 away. White text reads best on it, at 16.87:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.24:1 |
| White text | 16.87:1 |
Values
| HEX | #191A37 |
| RGB | rgb(25, 26, 55) |
| HSL | hsl(238, 38%, 16%) |
| OKLCH | oklch(23.4% 0.055 279.7) |
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 #191A37 | 16.87:1 | AAA | Lc -106.1 | Preferred for body text |
| Black text on #191A37 | 1.24:1 | Fails | Lc 0.0 | Not readable |
| #191A37 text on white | 16.87:1 | AAA | Lc 103.7 | Preferred for body text |
| #191A37 text on black | 1.24:1 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E7E9F7
oklch(93.7% 0.019 279.5)
-
Step 200
200
#D4D7F1
oklch(88.5% 0.036 280.4)
-
Step 300
300
#B7BDEB
oklch(80.9% 0.065 279)
-
Step 400
400
#9399E1
oklch(70.6% 0.105 279.7)
-
Step 500
500
#7A7FD8
oklch(63.2% 0.133 279.4)
-
Step 600
600
#6466C5
oklch(55.5% 0.144 279.7)
-
Step 700
700
#5354AB
oklch(49% 0.136 279.6)
-
Step 800
800
#44458A
oklch(42.6% 0.112 279.9)
-
Step 900
900
#393B6E
oklch(37.7% 0.086 279.7)
-
Step 950
950 (this color)
#191A37
oklch(23.4% 0.055 279.7)
#191A37 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) | #0E1E38 | 0.019 |
| Deuteranopia (no green cones) | #0C1C36 | 0.020 |
| Tritanopia (no blue cones) | #0F2025 | 0.048 |
| Achromatopsia (no color) | #1D1D1D | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #191A37
#191A37
oklch(23.4% 0.055 279.7)
- #231E00
#231E00
oklch(23.4% 0.049 100.5)
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 #191A37, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.033
- Dark #1B2431 ΔE 0.039
- Oxford Blue #1B263B ΔE 0.040
- Jet #212529 ΔE 0.055
- Navy Blue #001146 ΔE 0.057
- Dark Indigo #1F0954 ΔE 0.067
- Midnight Purple #280137 ΔE 0.068
- Very Dark Purple #2A0134 ΔE 0.070
Use #191A37 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.