#172B4D
Closest named color: Oxford Blue (#1B263B). oklch(29.2% 0.068 260.4), rgb(23, 43, 77).
Aa
White text reads best on this color (14.10:1).
About this color
#172B4D is a dark, muted blue. In OKLCH its lightness is 29%, its chroma 0.068 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.034 away. White text reads best on it, at 14.10:1.
| Hue family | Blues |
| Lightness | dark (29%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.48:1 |
| White text | 14.10:1 |
Values
| HEX | #172B4D |
| RGB | rgb(23, 43, 77) |
| HSL | hsl(218, 54%, 20%) |
| OKLCH | oklch(29.2% 0.068 260.4) |
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 #172B4D | 14.10:1 | AAA | Lc -103.7 | Preferred for body text |
| Black text on #172B4D | 1.48:1 | Fails | Lc 0.0 | Not readable |
| #172B4D text on white | 14.10:1 | AAA | Lc 100.6 | Preferred for body text |
| #172B4D text on black | 1.48:1 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EAFA
oklch(93.5% 0.024 262.1)
-
Step 200
200
#C9DAF7
oklch(88.5% 0.044 261.2)
-
Step 300
300
#A3C2F5
oklch(80.9% 0.08 260.3)
-
Step 400
400
#71A0F0
oklch(70.6% 0.128 260.6)
-
Step 500
500
#4B86EB
oklch(63% 0.164 260.4)
-
Step 600
600
#2E6DD9
oklch(55.5% 0.178 260.5)
-
Step 700
700
#215BBC
oklch(49.1% 0.165 260.2)
-
Step 800
800
#1D4B98
oklch(42.7% 0.136 260.2)
-
Step 900
900
#1D3F79
oklch(37.6% 0.107 260.4)
-
Step 950
950 (this color)
#172B4D
oklch(29.2% 0.068 260.4)
#172B4D 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) | #1C2E4E | 0.012 |
| Deuteranopia (no green cones) | #14294C | 0.008 |
| Tritanopia (no blue cones) | #003338 | 0.057 |
| Achromatopsia (no color) | #2B2B2B | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #172B4D
#172B4D
oklch(29.2% 0.068 260.4)
- #3B2800
#3B2800
oklch(29.2% 0.06 81)
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 #172B4D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.034
- Marine #042E60 ΔE 0.036
- Prussian Blue #1D3557 ΔE 0.036
- Space Cadet #2B2D42 ΔE 0.037
- Gunmetal #293241 ΔE 0.045
- Dark #1B2431 ΔE 0.052
- Midnight Green #073B4C ΔE 0.054
- Dark Blue Grey #1F3B4D ΔE 0.056
Use #172B4D 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.