#172136
Closest named color: Dark (#1B2431). oklch(24.9% 0.043 264.1), rgb(23, 33, 54).
Aa
White text reads best on this color (16.06:1).
About this color
#172136 is a very dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.043 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Dark (#1B2431), ΔE 0.017 away. White text reads best on it, at 16.06:1.
| Hue family | Blues |
| Lightness | very dark (25%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Dark (#1B2431) |
| Black text | 1.30:1 |
| White text | 16.06:1 |
Values
| HEX | #172136 |
| RGB | rgb(23, 33, 54) |
| HSL | hsl(221, 40%, 15%) |
| OKLCH | oklch(24.9% 0.043 264.1) |
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 #172136 | 16.06:1 | AAA | Lc -105.5 | Preferred for body text |
| Black text on #172136 | 1.30:1 | Fails | Lc 0.0 | Not readable |
| #172136 text on white | 16.06:1 | AAA | Lc 103.0 | Preferred for body text |
| #172136 text on black | 1.30:1 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF4
oklch(93.6% 0.015 264.5)
-
Step 200
200
#D0D9EC
oklch(88.4% 0.028 265.4)
-
Step 300
300
#B0C1E2
oklch(80.9% 0.05 263.7)
-
Step 400
400
#87A0D4
oklch(70.6% 0.082 264.5)
-
Step 500
500
#6A88C8
oklch(63.1% 0.103 264.5)
-
Step 600
600
#5171B5
oklch(55.6% 0.113 264)
-
Step 700
700
#425E9C
oklch(49% 0.105 264.5)
-
Step 800
800
#374D7E
oklch(42.6% 0.086 264.7)
-
Step 900
900
#2F4165
oklch(37.8% 0.066 263.3)
-
Step 950
950 (this color)
#172136
oklch(24.9% 0.043 264.1)
#172136 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) | #192337 | 0.008 |
| Deuteranopia (no green cones) | #162036 | 0.004 |
| Tritanopia (no blue cones) | #0A2529 | 0.037 |
| Achromatopsia (no color) | #212121 | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #172136
#172136
oklch(24.9% 0.043 264.1)
- #2B2006
#2B2006
oklch(25.1% 0.043 85.8)
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 #172136, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.017
- Oxford Blue #1B263B ΔE 0.020
- Rich Black #0D1B2A ΔE 0.034
- Jet #212529 ΔE 0.036
- Space Cadet #2B2D42 ΔE 0.057
- Gunmetal #293241 ΔE 0.067
- Navy Blue #001146 ΔE 0.071
- Marine #042E60 ΔE 0.081
Use #172136 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.