#17233C
Closest named color: Oxford Blue (#1B263B). oklch(25.9% 0.05 263.8), rgb(23, 35, 60).
Aa
White text reads best on this color (15.64:1).
About this color
#17233C is a dark, muted blue. In OKLCH its lightness is 26%, its chroma 0.050 and its hue 264°. 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 15.64:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.34:1 |
| White text | 15.64:1 |
Values
| HEX | #17233C |
| RGB | rgb(23, 35, 60) |
| HSL | hsl(221, 45%, 16%) |
| OKLCH | oklch(25.9% 0.05 263.8) |
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 #17233C | 15.64:1 | AAA | Lc -105.2 | Preferred for body text |
| Black text on #17233C | 1.34:1 | Fails | Lc 0.0 | Not readable |
| #17233C text on white | 15.64:1 | AAA | Lc 102.5 | Preferred for body text |
| #17233C text on black | 1.34:1 | 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
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CEDAF0
oklch(88.6% 0.033 262.7)
-
Step 300
300
#ADC1E8
oklch(80.9% 0.06 263.7)
-
Step 400
400
#82A0DC
oklch(70.7% 0.095 263.7)
-
Step 500
500
#6387D3
oklch(63% 0.122 264)
-
Step 600
600
#4A70C0
oklch(55.6% 0.132 263.5)
-
Step 700
700
#3C5DA6
oklch(49.1% 0.123 264.1)
-
Step 800
800
#314C86
oklch(42.6% 0.102 263.8)
-
Step 900
900
#2B406C
oklch(37.7% 0.08 263.7)
-
Step 950
950 (this color)
#17233C
oklch(25.9% 0.05 263.8)
#17233C 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) | #19253D | 0.008 |
| Deuteranopia (no green cones) | #15223B | 0.005 |
| Tritanopia (no blue cones) | #05282C | 0.044 |
| Achromatopsia (no color) | #232323 | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17233C
#17233C
oklch(25.9% 0.05 263.8)
- #2F2102
#2F2102
oklch(25.8% 0.05 83.8)
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 #17233C, 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 0.023
- Jet #212529 ΔE 0.041
- Rich Black #0D1B2A ΔE 0.045
- Space Cadet #2B2D42 ΔE 0.049
- Gunmetal #293241 ΔE 0.060
- Marine #042E60 ΔE 0.069
- Navy Blue #001146 ΔE 0.071
Use #17233C 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.