#17283B
Closest named color: Oxford Blue (#1B263B). oklch(27.2% 0.042 252.1), rgb(23, 40, 59).
Aa
White text reads best on this color (14.96:1).
About this color
#17283B is a dark, muted blue. In OKLCH its lightness is 27%, its chroma 0.042 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.008 away. White text reads best on it, at 14.96:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.40:1 |
| White text | 14.96:1 |
Values
| HEX | #17283B |
| RGB | rgb(23, 40, 59) |
| HSL | hsl(212, 44%, 16%) |
| OKLCH | oklch(27.2% 0.042 252.1) |
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 #17283B | 14.96:1 | AAA | Lc -104.6 | Preferred for body text |
| Black text on #17283B | 1.40:1 | Fails | Lc 0.0 | Not readable |
| #17283B text on white | 14.96:1 | AAA | Lc 101.8 | Preferred for body text |
| #17283B text on black | 1.40:1 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF4
oklch(93.7% 0.015 251.2)
-
Step 200
200
#CCDBEB
oklch(88.5% 0.027 249.9)
-
Step 300
300
#AAC3E1
oklch(80.8% 0.051 253.1)
-
Step 400
400
#7CA4D2
oklch(70.7% 0.081 252.4)
-
Step 500
500
#5A8DC6
oklch(63.2% 0.102 252.2)
-
Step 600
600
#3E76B2
oklch(55.6% 0.111 251.9)
-
Step 700
700
#306399
oklch(49.1% 0.103 251.8)
-
Step 800
800
#29517C
oklch(42.7% 0.085 251.9)
-
Step 900
900
#264364
oklch(37.6% 0.067 252.8)
-
Step 950
950 (this color)
#17283B
oklch(27.2% 0.042 252.1)
#17283B 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) | #20293C | 0.014 |
| Deuteranopia (no green cones) | #1C253B | 0.012 |
| Tritanopia (no blue cones) | #042C2F | 0.036 |
| Achromatopsia (no color) | #272727 | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17283B
#17283B
oklch(27.2% 0.042 252.1)
- #34230E
#34230E
oklch(27.2% 0.042 70.2)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes and gradients that use #17283B
These curated palettes and gradients contain exactly #17283B. Open one to see the full color scheme around it.
Palettes
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.008
- Dark #1B2431 ΔE 0.020
- Jet #212529 ΔE 0.034
- Space Cadet #2B2D42 ΔE 0.038
- Gunmetal #293241 ΔE 0.046
- Rich Black #0D1B2A ΔE 0.054
- Prussian Blue #1D3557 ΔE 0.062
- Midnight Green #073B4C ΔE 0.064
Use #17283B 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.