#091F42
Closest named color: Oxford Blue (#1B263B). oklch(24.5% 0.072 259.4), rgb(9, 31, 66).
Aa
White text reads best on this color (16.32:1).
About this color
#091F42 is a very dark, moderately saturated blue. In OKLCH its lightness is 24%, its chroma 0.072 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.039 away. White text reads best on it, at 16.32:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.28:1 |
| White text | 16.32:1 |
Values
| HEX | #091F42 |
| RGB | rgb(9, 31, 66) |
| HSL | hsl(217, 76%, 15%) |
| OKLCH | oklch(24.5% 0.072 259.4) |
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 #091F42 | 16.32:1 | AAA | Lc -105.6 | Preferred for body text |
| Black text on #091F42 | 1.28:1 | Fails | Lc 0.0 | Not readable |
| #091F42 text on white | 16.32:1 | AAA | Lc 103.1 | Preferred for body text |
| #091F42 text on black | 1.28:1 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFB
oklch(93.7% 0.025 257.6)
-
Step 200
200
#C7DAF9
oklch(88.4% 0.048 260.2)
-
Step 300
300
#A0C2F8
oklch(80.9% 0.085 259.5)
-
Step 400
400
#6CA0F5
oklch(70.6% 0.137 259.8)
-
Step 500
500
#4386F1
oklch(63.1% 0.175 259.4)
-
Step 600
600
#226DE0
oklch(55.7% 0.19 259.4)
-
Step 700
700
#155AC2
oklch(49.1% 0.176 259.5)
-
Step 800
800
#144A9D
oklch(42.6% 0.146 259.4)
-
Step 900
900
#183F7D
oklch(37.7% 0.114 259.5)
-
Step 950
950 (this color)
#091F42
oklch(24.5% 0.072 259.4)
#091F42 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) | #0C2343 | 0.014 |
| Deuteranopia (no green cones) | #011D41 | 0.012 |
| Tritanopia (no blue cones) | #00272D | 0.055 |
| Achromatopsia (no color) | #202020 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #091F42
#091F42
oklch(24.5% 0.072 259.4)
- #2D1D00
#2D1D00
oklch(24.5% 0.051 79.5)
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 #091F42, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.039
- Navy Blue #001146 ΔE 0.046
- Rich Black #0D1B2A ΔE 0.046
- Dark #1B2431 ΔE 0.046
- Jet #212529 ΔE 0.065
- Dark Indigo #1F0954 ΔE 0.066
- Marine #042E60 ΔE 0.068
- Space Cadet #2B2D42 ΔE 0.072
Use #091F42 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.