#172543
Closest named color: Oxford Blue (#1B263B). oklch(26.9% 0.059 264), rgb(23, 37, 67).
Aa
White text reads best on this color (15.19:1).
About this color
#172543 is a dark, muted blue. In OKLCH its lightness is 27%, its chroma 0.059 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.017 away. White text reads best on it, at 15.19:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.38:1 |
| White text | 15.19:1 |
Values
| HEX | #172543 |
| RGB | rgb(23, 37, 67) |
| HSL | hsl(221, 49%, 18%) |
| OKLCH | oklch(26.9% 0.059 264) |
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 #172543 | 15.19:1 | AAA | Lc -104.8 | Preferred for body text |
| Black text on #172543 | 1.38:1 | Fails | Lc 0.0 | Not readable |
| #172543 text on white | 15.19:1 | AAA | Lc 102.0 | Preferred for body text |
| #172543 text on black | 1.38:1 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CCDAF4
oklch(88.6% 0.039 262.9)
-
Step 300
300
#AAC1EF
oklch(81% 0.07 264.1)
-
Step 400
400
#7D9FE7
oklch(70.7% 0.113 264.4)
-
Step 500
500
#5C86E0
oklch(63.2% 0.144 263.9)
-
Step 600
600
#436ECE
oklch(55.7% 0.156 263.9)
-
Step 700
700
#355BB2
oklch(49.1% 0.145 264.1)
-
Step 800
800
#2C4B90
oklch(42.8% 0.12 263.9)
-
Step 900
900
#273F73
oklch(37.7% 0.094 263.8)
-
Step 950
950 (this color)
#172543
oklch(26.9% 0.059 264)
#172543 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) | #182844 | 0.010 |
| Deuteranopia (no green cones) | #122442 | 0.008 |
| Tritanopia (no blue cones) | #002C30 | 0.054 |
| Achromatopsia (no color) | #262626 | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #172543
#172543
oklch(26.9% 0.059 264)
- #332300
#332300
oklch(26.8% 0.055 83)
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 #172543, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.017
- Dark #1B2431 ΔE 0.034
- Space Cadet #2B2D42 ΔE 0.044
- Jet #212529 ΔE 0.051
- Gunmetal #293241 ΔE 0.055
- Marine #042E60 ΔE 0.056
- Rich Black #0D1B2A ΔE 0.057
- Prussian Blue #1D3557 ΔE 0.060
Use #172543 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.