#172736
Closest named color: Dark (#1B2431). oklch(26.6% 0.036 247.7), rgb(23, 39, 54).
Aa
White text reads best on this color (15.21:1).
About this color
#172736 is a dark, muted blue. In OKLCH its lightness is 27%, its chroma 0.036 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Dark (#1B2431), ΔE 0.012 away. White text reads best on it, at 15.21:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | muted (0.036) |
| Temperature | cool |
| Nearest name | Dark (#1B2431) |
| Black text | 1.37:1 |
| White text | 15.21:1 |
Values
| HEX | #172736 |
| RGB | rgb(23, 39, 54) |
| HSL | hsl(209, 40%, 15%) |
| OKLCH | oklch(26.6% 0.036 247.7) |
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 #172736 | 15.21:1 | AAA | Lc -104.8 | Preferred for body text |
| Black text on #172736 | 1.37:1 | Fails | Lc 0.0 | Not readable |
| #172736 text on white | 15.21:1 | AAA | Lc 102.1 | Preferred for body text |
| #172736 text on black | 1.37:1 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF2
oklch(93.7% 0.012 248)
-
Step 200
200
#CDDBE8
oklch(88.5% 0.023 246.1)
-
Step 300
300
#ACC4DB
oklch(81% 0.042 247.2)
-
Step 400
400
#7FA5C9
oklch(70.7% 0.067 247.4)
-
Step 500
500
#5E8EBB
oklch(63.1% 0.086 247.8)
-
Step 600
600
#4378A7
oklch(55.7% 0.093 247.1)
-
Step 700
700
#356490
oklch(49% 0.088 248.6)
-
Step 800
800
#2C5274
oklch(42.6% 0.072 247.3)
-
Step 900
900
#28445E
oklch(37.7% 0.056 247.8)
-
Step 950
950 (this color)
#172736
oklch(26.6% 0.036 247.7)
#172736 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) | #212737 | 0.015 |
| Deuteranopia (no green cones) | #1D2436 | 0.013 |
| Tritanopia (no blue cones) | #092B2C | 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°).
- #172736
#172736
oklch(26.6% 0.036 247.7)
- #312212
#312212
oklch(26.6% 0.035 67.1)
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 #172736, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.012
- Oxford Blue #1B263B ΔE 0.013
- Jet #212529 ΔE 0.026
- Space Cadet #2B2D42 ΔE 0.044
- Rich Black #0D1B2A ΔE 0.048
- Gunmetal #293241 ΔE 0.050
- Midnight Green #073B4C ΔE 0.069
- Prussian Blue #1D3557 ΔE 0.070
Use #172736 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.