#172B35
Closest named color: Dark (#1B2431). oklch(27.7% 0.032 231.2), rgb(23, 43, 53).
Aa
White text reads best on this color (14.65:1).
About this color
#172B35 is a dark, muted blue. In OKLCH its lightness is 28%, its chroma 0.032 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Dark (#1B2431), ΔE 0.024 away. White text reads best on it, at 14.65:1.
| Hue family | Blues |
| Lightness | dark (28%) |
| Chroma | muted (0.032) |
| Temperature | cool |
| Nearest name | Dark (#1B2431) |
| Black text | 1.43:1 |
| White text | 14.65:1 |
Values
| HEX | #172B35 |
| RGB | rgb(23, 43, 53) |
| HSL | hsl(200, 39%, 15%) |
| OKLCH | oklch(27.7% 0.032 231.2) |
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 #172B35 | 14.65:1 | AAA | Lc -104.3 | Preferred for body text |
| Black text on #172B35 | 1.43:1 | Fails | Lc 0.0 | Not readable |
| #172B35 text on white | 14.65:1 | AAA | Lc 101.4 | Preferred for body text |
| #172B35 text on black | 1.43:1 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBF0
oklch(93.5% 0.011 234.8)
-
Step 200
200
#CCDCE5
oklch(88.5% 0.021 232.2)
-
Step 300
300
#A9C6D5
oklch(81% 0.038 230.3)
-
Step 400
400
#7AA8C0
oklch(70.7% 0.06 231.4)
-
Step 500
500
#5692B0
oklch(63.1% 0.077 231.5)
-
Step 600
600
#387C9C
oklch(55.6% 0.084 231.4)
-
Step 700
700
#2A6885
oklch(49% 0.078 231.8)
-
Step 800
800
#24556C
oklch(42.6% 0.065 231.4)
-
Step 900
900
#234658
oklch(37.6% 0.051 232.8)
-
Step 950
950 (this color)
#172B35
oklch(27.7% 0.032 231.2)
#172B35 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) | #262A36 | 0.022 |
| Deuteranopia (no green cones) | #222735 | 0.020 |
| Tritanopia (no blue cones) | #082E2E | 0.024 |
| Achromatopsia (no color) | #282828 | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #172B35
#172B35
oklch(27.7% 0.032 231.2)
- #35241A
#35241A
oklch(27.8% 0.031 51.5)
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 #172B35, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.024
- Oxford Blue #1B263B ΔE 0.024
- Jet #212529 ΔE 0.027
- Space Cadet #2B2D42 ΔE 0.040
- Gunmetal #293241 ΔE 0.042
- Midnight Green #073B4C ΔE 0.059
- Rich Black #0D1B2A ΔE 0.060
- Dark Blue Grey #1F3B4D ΔE 0.064
Use #172B35 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.