#223BB9
Closest named color: Sapphire (#2138AB). oklch(42.7% 0.199 267.5), rgb(34, 59, 185).
Aa
White text reads best on this color (8.77:1).
About this color
#223BB9 is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.199 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.024 away. White text reads best on it, at 8.77:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.199) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.39:1 |
| White text | 8.77:1 |
Values
| HEX | #223BB9 |
| RGB | rgb(34, 59, 185) |
| HSL | hsl(230, 69%, 43%) |
| OKLCH | oklch(42.7% 0.199 267.5) |
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 #223BB9 | 8.77:1 | AAA | Lc -93.7 | Preferred for body text |
| Black text on #223BB9 | 2.39:1 | Fails | Lc 14.8 | Not readable |
| #223BB9 text on white | 8.77:1 | AAA | Lc 89.2 | Fine for body text |
| #223BB9 text on black | 2.39:1 | Fails | Lc -13.1 | 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 800.
-
Step 50
50
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFF
oklch(93.7% 0.03 267.2)
-
Step 200
200
#C9D9FF
oklch(88.6% 0.055 267.2)
-
Step 300
300
#A6BFFF
oklch(80.9% 0.095 267.8)
-
Step 400
400
#779BFF
oklch(70.7% 0.152 267.5)
-
Step 500
500
#557EFF
oklch(63.2% 0.197 267.3)
-
Step 600
600
#375CFF
oklch(55.6% 0.244 267.4)
-
Step 700
700
#2A46E5
oklch(49.1% 0.239 267.6)
-
Step 800
800 (this color)
#223BB9
oklch(42.7% 0.199 267.5)
-
Step 900
900
#1F3592
oklch(37.7% 0.155 267.7)
-
Step 950
950
#122055
oklch(26.9% 0.098 267.9)
#223BB9 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) | #0052BD | 0.052 |
| Deuteranopia (no green cones) | #0043B7 | 0.022 |
| Tritanopia (no blue cones) | #005E75 | 0.154 |
| Achromatopsia (no color) | #4B4B4B | 0.199 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #223BB9
#223BB9
oklch(42.7% 0.199 267.5)
- #634B00
#634B00
oklch(42.6% 0.087 87.5)
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 #223BB9, closest first.
No curated palette has a color within ΔE 0.04 of #223BB9.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.024
- Blue Blue #2242C7 ΔE 0.028
- Majorelle Blue #3F37C9 ΔE 0.043
- Indigo Blue #3A18B1 ΔE 0.061
- Blue With A Hint Of Purple #533CC6 ΔE 0.070
- True Blue #010FCC ΔE 0.073
- Blueberry #464196 ΔE 0.075
- Blurple #5539CC ΔE 0.075
Use #223BB9 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.