#172837
Closest named color: Oxford Blue (#1B263B). oklch(26.9% 0.036 246.3), rgb(23, 40, 55).
Aa
White text reads best on this color (15.05:1).
About this color
#172837 is a dark, muted blue. In OKLCH its lightness is 27%, its chroma 0.036 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.013 away. White text reads best on it, at 15.05:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | muted (0.036) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.39:1 |
| White text | 15.05:1 |
Values
| HEX | #172837 |
| RGB | rgb(23, 40, 55) |
| HSL | hsl(208, 41%, 15%) |
| OKLCH | oklch(26.9% 0.036 246.3) |
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 #172837 | 15.05:1 | AAA | Lc -104.7 | Preferred for body text |
| Black text on #172837 | 1.39:1 | Fails | Lc 0.0 | Not readable |
| #172837 text on white | 15.05:1 | AAA | Lc 101.9 | Preferred for body text |
| #172837 text on black | 1.39:1 | 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
#CDDBE8
oklch(88.5% 0.023 246.1)
-
Step 300
300
#ABC4DB
oklch(80.9% 0.042 246.1)
-
Step 400
400
#7DA5C9
oklch(70.6% 0.069 246.1)
-
Step 500
500
#5B8FBC
oklch(63.2% 0.088 245.9)
-
Step 600
600
#4078A8
oklch(55.6% 0.096 246.5)
-
Step 700
700
#326590
oklch(49.1% 0.088 246.3)
-
Step 800
800
#2A5275
oklch(42.6% 0.074 247)
-
Step 900
900
#27445E
oklch(37.6% 0.057 247)
-
Step 950
950 (this color)
#172837
oklch(26.9% 0.036 246.3)
#172837 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) | #222838 | 0.017 |
| Deuteranopia (no green cones) | #1E2537 | 0.014 |
| Tritanopia (no blue cones) | #082C2D | 0.031 |
| Achromatopsia (no color) | #262626 | 0.036 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #172837
#172837
oklch(26.9% 0.036 246.3)
- #322312
#322312
oklch(27% 0.036 68.7)
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 #172837, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.013
- Dark #1B2431 ΔE 0.016
- Jet #212529 ΔE 0.028
- Space Cadet #2B2D42 ΔE 0.041
- Gunmetal #293241 ΔE 0.047
- Rich Black #0D1B2A ΔE 0.052
- Midnight Green #073B4C ΔE 0.066
- Prussian Blue #1D3557 ΔE 0.067
Use #172837 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.