#172145
Closest named color: Oxford Blue (#1B263B). oklch(26% 0.069 269.5), rgb(23, 33, 69).
Aa
White text reads best on this color (15.67:1).
About this color
#172145 is a dark, muted blue. In OKLCH its lightness is 26%, its chroma 0.069 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.028 away. White text reads best on it, at 15.67:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.33:1 |
| White text | 15.67:1 |
Values
| HEX | #172145 |
| RGB | rgb(23, 33, 69) |
| HSL | hsl(227, 50%, 18%) |
| OKLCH | oklch(26% 0.069 269.5) |
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 #172145 | 15.67:1 | AAA | Lc -105.1 | Preferred for body text |
| Black text on #172145 | 1.33:1 | Fails | Lc 0.0 | Not readable |
| #172145 text on white | 15.67:1 | AAA | Lc 102.5 | Preferred for body text |
| #172145 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CDD9F8
oklch(88.6% 0.045 268.7)
-
Step 300
300
#ABBFF6
oklch(80.9% 0.081 269)
-
Step 400
400
#809CF2
oklch(70.8% 0.13 269.2)
-
Step 500
500
#6280ED
oklch(63.1% 0.167 269.6)
-
Step 600
600
#4B67DB
oklch(55.6% 0.18 269.5)
-
Step 700
700
#3C55BE
oklch(49.1% 0.167 269.2)
-
Step 800
800
#32469A
oklch(42.7% 0.139 269.6)
-
Step 900
900
#2B3C7A
oklch(37.7% 0.107 269.2)
-
Step 950
950 (this color)
#172145
oklch(26% 0.069 269.5)
#172145 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) | #102546 | 0.014 |
| Deuteranopia (no green cones) | #092144 | 0.017 |
| Tritanopia (no blue cones) | #00292F | 0.060 |
| Achromatopsia (no color) | #232323 | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #172145
#172145
oklch(26% 0.069 269.5)
- #2E2200
#2E2200
oklch(25.9% 0.053 89.1)
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 #172145, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.028
- Dark #1B2431 ΔE 0.042
- Space Cadet #2B2D42 ΔE 0.055
- Rich Black #0D1B2A ΔE 0.056
- Marine #042E60 ΔE 0.059
- Jet #212529 ΔE 0.060
- Navy Blue #001146 ΔE 0.061
- Dark Indigo #1F0954 ΔE 0.063
Use #172145 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.