#172A38
Closest named color: Oxford Blue (#1B263B). oklch(27.6% 0.036 241.7), rgb(23, 42, 56).
Aa
White text reads best on this color (14.73:1).
About this color
#172A38 is a dark, muted blue. In OKLCH its lightness is 28%, its chroma 0.036 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.017 away. White text reads best on it, at 14.73:1.
| Hue family | Blues |
| Lightness | dark (28%) |
| Chroma | muted (0.036) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.42:1 |
| White text | 14.73:1 |
Values
| HEX | #172A38 |
| RGB | rgb(23, 42, 56) |
| HSL | hsl(205, 42%, 15%) |
| OKLCH | oklch(27.6% 0.036 241.7) |
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 #172A38 | 14.73:1 | AAA | Lc -104.4 | Preferred for body text |
| Black text on #172A38 | 1.42:1 | Fails | Lc 0.0 | Not readable |
| #172A38 text on white | 14.73:1 | AAA | Lc 101.5 | Preferred for body text |
| #172A38 text on black | 1.42:1 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF2
oklch(93.6% 0.013 244.3)
-
Step 200
200
#CCDBE8
oklch(88.4% 0.024 244.2)
-
Step 300
300
#A9C5DA
oklch(80.9% 0.042 240.5)
-
Step 400
400
#7AA6C8
oklch(70.6% 0.069 242.1)
-
Step 500
500
#5790BA
oklch(63.1% 0.087 241.9)
-
Step 600
600
#3A7AA6
oklch(55.7% 0.095 241.3)
-
Step 700
700
#2C668E
oklch(49% 0.088 241.8)
-
Step 800
800
#265373
oklch(42.6% 0.073 242.2)
-
Step 900
900
#24455D
oklch(37.7% 0.057 241.9)
-
Step 950
950 (this color)
#172A38
oklch(27.6% 0.036 241.7)
#172A38 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) | #242A39 | 0.019 |
| Deuteranopia (no green cones) | #1F2738 | 0.014 |
| Tritanopia (no blue cones) | #062D2F | 0.028 |
| Achromatopsia (no color) | #282828 | 0.036 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #172A38
#172A38
oklch(27.6% 0.036 241.7)
- #352415
#352415
oklch(27.7% 0.036 61.9)
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 #172A38, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.017
- Dark #1B2431 ΔE 0.021
- Jet #212529 ΔE 0.030
- Space Cadet #2B2D42 ΔE 0.038
- Gunmetal #293241 ΔE 0.042
- Rich Black #0D1B2A ΔE 0.058
- Midnight Green #073B4C ΔE 0.059
- Prussian Blue #1D3557 ΔE 0.062
Use #172A38 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.