#234BB1
Closest named color: Blue Blue (#2242C7). oklch(45% 0.169 264.3), rgb(35, 75, 177).
Aa
White text reads best on this color (7.74:1).
About this color
#234BB1 is a dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.169 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.040 away. White text reads best on it, at 7.74:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | vivid (0.169) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.71:1 |
| White text | 7.74:1 |
Values
| HEX | #234BB1 |
| RGB | rgb(35, 75, 177) |
| HSL | hsl(223, 67%, 42%) |
| OKLCH | oklch(45% 0.169 264.3) |
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 #234BB1 | 7.74:1 | AAA | Lc -91.1 | Preferred for body text |
| Black text on #234BB1 | 2.71:1 | Fails | Lc 17.7 | Dividers and decoration only |
| #234BB1 text on white | 7.74:1 | AAA | Lc 86.3 | Fine for body text |
| #234BB1 text on black | 2.71:1 | Fails | Lc -15.8 | Dividers and decoration only |
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
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFE
oklch(93.6% 0.029 264.4)
-
Step 200
200
#C7D9FE
oklch(88.4% 0.055 264.7)
-
Step 300
300
#A2C0FF
oklch(80.9% 0.096 264.7)
-
Step 400
400
#709DFF
oklch(70.7% 0.152 264.2)
-
Step 500
500
#4B80FF
oklch(63.1% 0.197 264.4)
-
Step 600
600
#2E64F1
oklch(55.6% 0.22 264.3)
-
Step 700
700
#2252D2
oklch(49.2% 0.204 264.3)
-
Step 800
800 (this color)
#234BB1
oklch(45% 0.169 264.3)
-
Step 900
900
#1C3B86
oklch(37.7% 0.131 264.1)
-
Step 950
950
#11234F
oklch(27% 0.084 264.6)
#234BB1 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) | #0059B4 | 0.036 |
| Deuteranopia (no green cones) | #004CAF | 0.018 |
| Tritanopia (no blue cones) | #006576 | 0.133 |
| Achromatopsia (no color) | #535353 | 0.169 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #234BB1
#234BB1
oklch(45% 0.169 264.3)
- #6D5000
#6D5000
oklch(45% 0.092 84.4)
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 #234BB1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.040
- Sapphire #2138AB ΔE 0.046
- Cobalt #1E488F ΔE 0.056
- Majorelle Blue #3F37C9 ΔE 0.060
- Blueberry #464196 ΔE 0.061
- Dusk Blue #26538D ΔE 0.065
- Blue With A Hint Of Purple #533CC6 ΔE 0.072
- Denim Blue #3B5B92 ΔE 0.076
Use #234BB1 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.