#172043
Closest named color: Oxford Blue (#1B263B). oklch(25.6% 0.067 270.3), rgb(23, 32, 67).
Aa
White text reads best on this color (15.85:1).
About this color
#172043 is a dark, muted blue. In OKLCH its lightness is 26%, its chroma 0.067 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.029 away. White text reads best on it, at 15.85:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.32:1 |
| White text | 15.85:1 |
Values
| HEX | #172043 |
| RGB | rgb(23, 32, 67) |
| HSL | hsl(228, 49%, 18%) |
| OKLCH | oklch(25.6% 0.067 270.3) |
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 #172043 | 15.85:1 | AAA | Lc -105.3 | Preferred for body text |
| Black text on #172043 | 1.32:1 | Fails | Lc 0.0 | Not readable |
| #172043 text on white | 15.85:1 | AAA | Lc 102.7 | Preferred for body text |
| #172043 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E4EAFA
oklch(93.7% 0.023 269.4)
-
Step 200
200
#CED8F7
oklch(88.4% 0.044 271.3)
-
Step 300
300
#ADBFF5
oklch(81% 0.079 270.3)
-
Step 400
400
#829CF0
oklch(70.8% 0.127 269.9)
-
Step 500
500
#6580EA
oklch(63% 0.162 270.5)
-
Step 600
600
#4E67D9
oklch(55.7% 0.176 270.4)
-
Step 700
700
#3F55BC
oklch(49.1% 0.164 270.2)
-
Step 800
800
#344698
oklch(42.7% 0.135 270.4)
-
Step 900
900
#2D3C79
oklch(37.8% 0.105 270.3)
-
Step 950
950 (this color)
#172043
oklch(25.6% 0.067 270.3)
#172043 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) | #102444 | 0.014 |
| Deuteranopia (no green cones) | #092042 | 0.017 |
| Tritanopia (no blue cones) | #00282E | 0.059 |
| Achromatopsia (no color) | #222222 | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #172043
#172043
oklch(25.6% 0.067 270.3)
- #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 #172043, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.029
- Dark #1B2431 ΔE 0.040
- Rich Black #0D1B2A ΔE 0.052
- Space Cadet #2B2D42 ΔE 0.057
- Jet #212529 ΔE 0.058
- Navy Blue #001146 ΔE 0.059
- Dark Indigo #1F0954 ΔE 0.063
- Marine #042E60 ΔE 0.063
Use #172043 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.