#172B48
Closest named color: Oxford Blue (#1B263B). oklch(28.8% 0.059 257.7), rgb(23, 43, 72).
Aa
White text reads best on this color (14.23:1).
About this color
#172B48 is a dark, muted blue. In OKLCH its lightness is 29%, its chroma 0.059 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.026 away. White text reads best on it, at 14.23:1.
| Hue family | Blues |
| Lightness | dark (29%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.47:1 |
| White text | 14.23:1 |
Values
| HEX | #172B48 |
| RGB | rgb(23, 43, 72) |
| HSL | hsl(216, 52%, 19%) |
| OKLCH | oklch(28.8% 0.059 257.7) |
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 #172B48 | 14.23:1 | AAA | Lc -103.8 | Preferred for body text |
| Black text on #172B48 | 1.47:1 | Fails | Lc 0.0 | Not readable |
| #172B48 text on white | 14.23:1 | AAA | Lc 100.8 | Preferred for body text |
| #172B48 text on black | 1.47:1 | 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
#E2EBF8
oklch(93.7% 0.02 257.5)
-
Step 200
200
#C9DBF4
oklch(88.6% 0.04 256.6)
-
Step 300
300
#A4C3EE
oklch(80.9% 0.07 256.6)
-
Step 400
400
#73A2E6
oklch(70.7% 0.112 257.6)
-
Step 500
500
#4E89DF
oklch(63.1% 0.144 257.9)
-
Step 600
600
#3071CD
oklch(55.6% 0.157 257.8)
-
Step 700
700
#235EB1
oklch(49% 0.146 257.8)
-
Step 800
800
#1F4D8F
oklch(42.6% 0.12 258)
-
Step 900
900
#1F4172
oklch(37.7% 0.093 257.8)
-
Step 950
950 (this color)
#172B48
oklch(28.8% 0.059 257.7)
#172B48 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) | #1F2D49 | 0.013 |
| Deuteranopia (no green cones) | #182947 | 0.006 |
| Tritanopia (no blue cones) | #003236 | 0.050 |
| Achromatopsia (no color) | #2B2B2B | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #172B48
#172B48
oklch(28.8% 0.059 257.7)
- #3B2601
#3B2601
oklch(28.7% 0.059 76.6)
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 #172B48, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.026
- Space Cadet #2B2D42 ΔE 0.033
- Prussian Blue #1D3557 ΔE 0.040
- Gunmetal #293241 ΔE 0.040
- Dark #1B2431 ΔE 0.044
- Marine #042E60 ΔE 0.044
- Midnight Green #073B4C ΔE 0.052
- Dark Blue Grey #1F3B4D ΔE 0.055
Use #172B48 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.