#10223F
Closest named color: Oxford Blue (#1B263B). oklch(25.4% 0.06 259.5), rgb(16, 34, 63).
Aa
White text reads best on this color (15.87:1).
About this color
#10223F is a dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.060 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.024 away. White text reads best on it, at 15.87:1.
| Hue family | Blues |
| Lightness | dark (25%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.32:1 |
| White text | 15.87:1 |
Values
| HEX | #10223F |
| RGB | rgb(16, 34, 63) |
| HSL | hsl(217, 59%, 15%) |
| OKLCH | oklch(25.4% 0.06 259.5) |
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 #10223F | 15.87:1 | AAA | Lc -105.3 | Preferred for body text |
| Black text on #10223F | 1.32:1 | Fails | Lc 0.0 | Not readable |
| #10223F text on white | 15.87:1 | AAA | Lc 102.7 | Preferred for body text |
| #10223F 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF8
oklch(93.5% 0.021 261.8)
-
Step 200
200
#CADAF4
oklch(88.4% 0.04 260.1)
-
Step 300
300
#A6C2EF
oklch(80.9% 0.071 259.8)
-
Step 400
400
#76A1E7
oklch(70.7% 0.113 259.8)
-
Step 500
500
#5188E0
oklch(63% 0.145 259.4)
-
Step 600
600
#3570CE
oklch(55.6% 0.158 259.4)
-
Step 700
700
#285DB2
oklch(49% 0.147 259.6)
-
Step 800
800
#224D90
oklch(42.8% 0.121 259.1)
-
Step 900
900
#214073
oklch(37.6% 0.095 259.8)
-
Step 950
950 (this color)
#10223F
oklch(25.4% 0.06 259.5)
#10223F 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) | #152540 | 0.013 |
| Deuteranopia (no green cones) | #0E203E | 0.008 |
| Tritanopia (no blue cones) | #00292D | 0.050 |
| Achromatopsia (no color) | #222222 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #10223F
#10223F
oklch(25.4% 0.06 259.5)
- #301F00
#301F00
oklch(25.4% 0.053 79.1)
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 #10223F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.024
- Dark #1B2431 ΔE 0.032
- Rich Black #0D1B2A ΔE 0.044
- Jet #212529 ΔE 0.051
- Space Cadet #2B2D42 ΔE 0.058
- Navy Blue #001146 ΔE 0.061
- Marine #042E60 ΔE 0.066
- Gunmetal #293241 ΔE 0.069
Use #10223F 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.