#191F39
Closest named color: Oxford Blue (#1B263B). oklch(24.8% 0.05 272.4), rgb(25, 31, 57).
Aa
White text reads best on this color (16.19:1).
About this color
#191F39 is a very dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.050 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.024 away. White text reads best on it, at 16.19:1.
| Hue family | Blues |
| Lightness | very dark (25%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.29:1 |
| White text | 16.19:1 |
Values
| HEX | #191F39 |
| RGB | rgb(25, 31, 57) |
| HSL | hsl(229, 39%, 16%) |
| OKLCH | oklch(24.8% 0.05 272.4) |
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 #191F39 | 16.19:1 | AAA | Lc -105.6 | Preferred for body text |
| Black text on #191F39 | 1.29:1 | Fails | Lc 0.0 | Not readable |
| #191F39 text on white | 16.19:1 | AAA | Lc 103.1 | Preferred for body text |
| #191F39 text on black | 1.29:1 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E6E9F6
oklch(93.6% 0.018 275.6)
-
Step 200
200
#D1D8F0
oklch(88.4% 0.034 272.8)
-
Step 300
300
#B3BFE8
oklch(80.9% 0.06 272.2)
-
Step 400
400
#8C9DDC
oklch(70.7% 0.095 272.2)
-
Step 500
500
#7183D3
oklch(63.1% 0.122 272.8)
-
Step 600
600
#5A6CC0
oklch(55.7% 0.132 272.4)
-
Step 700
700
#4A59A6
oklch(49.1% 0.124 272.8)
-
Step 800
800
#3D4986
oklch(42.6% 0.102 273)
-
Step 900
900
#333E6B
oklch(37.7% 0.078 271.8)
-
Step 950
950 (this color)
#191F39
oklch(24.8% 0.05 272.4)
#191F39 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) | #15223A | 0.011 |
| Deuteranopia (no green cones) | #121F38 | 0.011 |
| Tritanopia (no blue cones) | #0C2429 | 0.044 |
| Achromatopsia (no color) | #202020 | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #191F39
#191F39
oklch(24.8% 0.05 272.4)
- #2A2000
#2A2000
oklch(24.8% 0.051 91.8)
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 #191F39, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.024
- Dark #1B2431 ΔE 0.026
- Rich Black #0D1B2A ΔE 0.037
- Jet #212529 ΔE 0.044
- Space Cadet #2B2D42 ΔE 0.059
- Navy Blue #001146 ΔE 0.065
- Gunmetal #293241 ΔE 0.071
- Dark Indigo #1F0954 ΔE 0.074
Use #191F39 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.