#223DA3
Closest named color: Sapphire (#2138AB). oklch(40.9% 0.168 267), rgb(34, 61, 163).
Aa
White text reads best on this color (9.27:1).
About this color
#223DA3 is a dark, vivid blue. In OKLCH its lightness is 41%, its chroma 0.168 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.017 away. White text reads best on it, at 9.27:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | vivid (0.168) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.26:1 |
| White text | 9.27:1 |
Values
| HEX | #223DA3 |
| RGB | rgb(34, 61, 163) |
| HSL | hsl(227, 65%, 39%) |
| OKLCH | oklch(40.9% 0.168 267) |
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 #223DA3 | 9.27:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #223DA3 | 2.26:1 | Fails | Lc 13.2 | Not readable |
| #223DA3 text on white | 9.27:1 | AAA | Lc 90.8 | Preferred for body text |
| #223DA3 text on black | 2.26:1 | Fails | Lc -11.6 | 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
#E1EAFE
oklch(93.6% 0.029 266.4)
-
Step 200
200
#C9D9FE
oklch(88.5% 0.054 266.8)
-
Step 300
300
#A5BFFF
oklch(80.9% 0.095 267.2)
-
Step 400
400
#769BFF
oklch(70.7% 0.152 267.2)
-
Step 500
500
#547EFF
oklch(63.1% 0.197 267)
-
Step 600
600
#3B62F0
oklch(55.6% 0.218 267.1)
-
Step 700
700
#2E50D1
oklch(49.1% 0.202 267)
-
Step 800
800 (this color)
#223DA3
oklch(40.9% 0.168 267)
-
Step 900
900
#223A86
oklch(37.8% 0.131 266.7)
-
Step 950
950
#14234E
oklch(27.1% 0.082 266.5)
#223DA3 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) | #004DA6 | 0.040 |
| Deuteranopia (no green cones) | #0041A1 | 0.020 |
| Tritanopia (no blue cones) | #00576A | 0.130 |
| Achromatopsia (no color) | #474747 | 0.168 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #223DA3
#223DA3
oklch(40.9% 0.168 267)
- #5E4600
#5E4600
oklch(40.9% 0.084 86.2)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #223DA3, closest first.
No curated palette has a color within ΔE 0.04 of #223DA3.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.017
- Cobalt #1E488F ΔE 0.044
- Blueberry #464196 ΔE 0.054
- Blue Blue #2242C7 ΔE 0.059
- Dark Slate Blue #483D8B ΔE 0.064
- Indigo Blue #3A18B1 ΔE 0.067
- Majorelle Blue #3F37C9 ΔE 0.070
- Dusk Blue #26538D ΔE 0.073
Use #223DA3 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.