#17213D
Closest named color: Oxford Blue (#1B263B). oklch(25.4% 0.055 267.6), rgb(23, 33, 61).
Aa
White text reads best on this color (15.89:1).
About this color
#17213D is a dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.055 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.020 away. White text reads best on it, at 15.89:1.
| Hue family | Blues |
| Lightness | dark (25%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.32:1 |
| White text | 15.89:1 |
Values
| HEX | #17213D |
| RGB | rgb(23, 33, 61) |
| HSL | hsl(224, 45%, 16%) |
| OKLCH | oklch(25.4% 0.055 267.6) |
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 #17213D | 15.89:1 | AAA | Lc -105.4 | Preferred for body text |
| Black text on #17213D | 1.32:1 | Fails | Lc 0.0 | Not readable |
| #17213D text on white | 15.89:1 | AAA | Lc 102.8 | Preferred for body text |
| #17213D text on black | 1.32:1 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CFD9F2
oklch(88.5% 0.036 268.3)
-
Step 300
300
#AEC0EC
oklch(80.9% 0.066 267.5)
-
Step 400
400
#849EE2
oklch(70.6% 0.104 267.7)
-
Step 500
500
#6685DA
oklch(63.2% 0.133 267.4)
-
Step 600
600
#4E6DC7
oklch(55.6% 0.144 267.3)
-
Step 700
700
#3F5AAC
oklch(49% 0.135 267.6)
-
Step 800
800
#344A8B
oklch(42.6% 0.111 267.5)
-
Step 900
900
#2D3E6F
oklch(37.5% 0.087 267.7)
-
Step 950
950 (this color)
#17213D
oklch(25.4% 0.055 267.6)
#17213D 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) | #15243E | 0.010 |
| Deuteranopia (no green cones) | #11213C | 0.009 |
| Tritanopia (no blue cones) | #04272C | 0.048 |
| Achromatopsia (no color) | #222222 | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17213D
#17213D
oklch(25.4% 0.055 267.6)
- #2D2100
#2D2100
oklch(25.5% 0.052 88.6)
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 #17213D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.020
- Dark #1B2431 ΔE 0.028
- Rich Black #0D1B2A ΔE 0.043
- Jet #212529 ΔE 0.047
- Space Cadet #2B2D42 ΔE 0.054
- Navy Blue #001146 ΔE 0.065
- Gunmetal #293241 ΔE 0.066
- Marine #042E60 ΔE 0.070
Use #17213D 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.