#17233B
Closest named color: Oxford Blue (#1B263B). oklch(25.8% 0.049 263.2), rgb(23, 35, 59).
Aa
White text reads best on this color (15.67:1).
About this color
#17233B is a dark, muted blue. In OKLCH its lightness is 26%, its chroma 0.049 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.013 away. White text reads best on it, at 15.67:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.33:1 |
| White text | 15.67:1 |
Values
| HEX | #17233B |
| RGB | rgb(23, 35, 59) |
| HSL | hsl(220, 44%, 16%) |
| OKLCH | oklch(25.8% 0.049 263.2) |
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 #17233B | 15.67:1 | AAA | Lc -105.2 | Preferred for body text |
| Black text on #17233B | 1.33:1 | Fails | Lc 0.0 | Not readable |
| #17233B text on white | 15.67:1 | AAA | Lc 102.5 | Preferred for body text |
| #17233B text on black | 1.33:1 | 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
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CEDAEF
oklch(88.6% 0.032 261.7)
-
Step 300
300
#ADC1E7
oklch(80.9% 0.058 263.2)
-
Step 400
400
#83A0DA
oklch(70.6% 0.091 263.7)
-
Step 500
500
#6488D0
oklch(63.1% 0.116 263.2)
-
Step 600
600
#4B70BE
oklch(55.5% 0.129 263.6)
-
Step 700
700
#3C5EA4
oklch(49.2% 0.119 263.2)
-
Step 800
800
#324D84
oklch(42.7% 0.097 263.2)
-
Step 900
900
#2C406A
oklch(37.6% 0.077 263.8)
-
Step 950
950 (this color)
#17233B
oklch(25.8% 0.049 263.2)
#17233B 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) | #1A253C | 0.009 |
| Deuteranopia (no green cones) | #15223A | 0.005 |
| Tritanopia (no blue cones) | #05282C | 0.043 |
| Achromatopsia (no color) | #232323 | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17233B
#17233B
oklch(25.8% 0.049 263.2)
- #2F2104
#2F2104
oklch(25.8% 0.048 82.3)
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 #17233B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.013
- Dark #1B2431 ΔE 0.021
- Jet #212529 ΔE 0.040
- Rich Black #0D1B2A ΔE 0.043
- Space Cadet #2B2D42 ΔE 0.049
- Gunmetal #293241 ΔE 0.060
- Marine #042E60 ΔE 0.071
- Navy Blue #001146 ΔE 0.072
Use #17233B 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.