#172045
Closest named color: Oxford Blue (#1B263B). oklch(25.8% 0.07 270.5), rgb(23, 32, 69).
Aa
White text reads best on this color (15.80:1).
About this color
#172045 is a dark, moderately saturated blue. In OKLCH its lightness is 26%, its chroma 0.070 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.031 away. White text reads best on it, at 15.80:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | moderately saturated (0.070) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.32:1 |
| White text | 15.80:1 |
Values
| HEX | #172045 |
| RGB | rgb(23, 32, 69) |
| HSL | hsl(228, 50%, 18%) |
| OKLCH | oklch(25.8% 0.07 270.5) |
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 #172045 | 15.80:1 | AAA | Lc -105.2 | Preferred for body text |
| Black text on #172045 | 1.32:1 | Fails | Lc 0.0 | Not readable |
| #172045 text on white | 15.80:1 | AAA | Lc 102.6 | Preferred for body text |
| #172045 text on black | 1.32:1 | 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
#E4E9FB
oklch(93.6% 0.025 273.5)
-
Step 200
200
#CDD8F9
oklch(88.4% 0.047 270.8)
-
Step 300
300
#ACBEF7
oklch(80.8% 0.083 270.9)
-
Step 400
400
#819BF3
oklch(70.7% 0.132 270.3)
-
Step 500
500
#647FEF
oklch(63.1% 0.17 270.7)
-
Step 600
600
#4D65DE
oklch(55.6% 0.186 270.7)
-
Step 700
700
#3E53C0
oklch(49% 0.172 270.5)
-
Step 800
800
#33459C
oklch(42.8% 0.143 270.4)
-
Step 900
900
#2C3B7C
oklch(37.7% 0.111 270.5)
-
Step 950
950 (this color)
#172045
oklch(25.8% 0.07 270.5)
#172045 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) | #0E2546 | 0.018 |
| Deuteranopia (no green cones) | #072144 | 0.018 |
| Tritanopia (no blue cones) | #00282F | 0.060 |
| Achromatopsia (no color) | #232323 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #172045
#172045
oklch(25.8% 0.07 270.5)
- #2D2200
#2D2200
oklch(25.8% 0.053 90.8)
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 #172045, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.031
- Dark #1B2431 ΔE 0.044
- Rich Black #0D1B2A ΔE 0.056
- Space Cadet #2B2D42 ΔE 0.058
- Navy Blue #001146 ΔE 0.058
- Dark Indigo #1F0954 ΔE 0.060
- Marine #042E60 ΔE 0.061
- Jet #212529 ΔE 0.062
Use #172045 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.