#10223A
Closest named color: Oxford Blue (#1B263B). oklch(25% 0.052 256.2), rgb(16, 34, 58).
Aa
White text reads best on this color (16.00:1).
About this color
#10223A is a dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.052 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.022 away. White text reads best on it, at 16.00:1.
| Hue family | Blues |
| Lightness | dark (25%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.31:1 |
| White text | 16.00:1 |
Values
| HEX | #10223A |
| RGB | rgb(16, 34, 58) |
| HSL | hsl(214, 57%, 15%) |
| OKLCH | oklch(25% 0.052 256.2) |
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 #10223A | 16.00:1 | AAA | Lc -105.4 | Preferred for body text |
| Black text on #10223A | 1.31:1 | Fails | Lc 0.0 | Not readable |
| #10223A text on white | 16.00:1 | AAA | Lc 102.9 | Preferred for body text |
| #10223A text on black | 1.31:1 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF6
oklch(93.7% 0.018 253.3)
-
Step 200
200
#CBDBF0
oklch(88.6% 0.034 255.2)
-
Step 300
300
#A7C3E8
oklch(80.9% 0.061 255.5)
-
Step 400
400
#78A3DD
oklch(70.7% 0.098 256.1)
-
Step 500
500
#548BD4
oklch(63.2% 0.125 256)
-
Step 600
600
#3873C1
oklch(55.5% 0.136 256.3)
-
Step 700
700
#2A60A7
oklch(49% 0.127 256.4)
-
Step 800
800
#244F87
oklch(42.7% 0.105 256.1)
-
Step 900
900
#22426C
oklch(37.7% 0.082 256)
-
Step 950
950 (this color)
#10223A
oklch(25% 0.052 256.2)
#10223A 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) | #18243B | 0.014 |
| Deuteranopia (no green cones) | #12203A | 0.007 |
| Tritanopia (no blue cones) | #00272B | 0.041 |
| Achromatopsia (no color) | #212121 | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #10223A
#10223A
oklch(25% 0.052 256.2)
- #301E01
#301E01
oklch(25.2% 0.051 75.9)
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 #10223A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.022
- Dark #1B2431 ΔE 0.025
- Rich Black #0D1B2A ΔE 0.037
- Jet #212529 ΔE 0.044
- Space Cadet #2B2D42 ΔE 0.059
- Navy Blue #001146 ΔE 0.065
- Gunmetal #293241 ΔE 0.069
- Marine #042E60 ΔE 0.074
Use #10223A 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.