#234FB8
Closest named color: Blue Blue (#2242C7). oklch(46.4% 0.173 263.7), rgb(35, 79, 184).
Aa
White text reads best on this color (7.28:1).
About this color
#234FB8 is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.173 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.038 away. White text reads best on it, at 7.28:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.173) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.88:1 |
| White text | 7.28:1 |
Values
| HEX | #234FB8 |
| RGB | rgb(35, 79, 184) |
| HSL | hsl(222, 68%, 43%) |
| OKLCH | oklch(46.4% 0.173 263.7) |
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 #234FB8 | 7.28:1 | AAA | Lc -89.6 | Fine for body text |
| Black text on #234FB8 | 2.88:1 | Fails | Lc 19.3 | Dividers and decoration only |
| #234FB8 text on white | 7.28:1 | AAA | Lc 84.7 | Fine for body text |
| #234FB8 text on black | 2.88:1 | Fails | Lc -17.3 | 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 700.
-
Step 50
50
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CADAF9
oklch(88.6% 0.046 263.7)
-
Step 300
300
#A5C1F8
oklch(81% 0.084 263.6)
-
Step 400
400
#759EF4
oklch(70.6% 0.134 263.9)
-
Step 500
500
#5283F0
oklch(63% 0.172 263.9)
-
Step 600
600
#376ADE
oklch(55.5% 0.186 263.6)
-
Step 700
700 (this color)
#234FB8
oklch(46.4% 0.173 263.7)
-
Step 800
800
#24489C
oklch(42.6% 0.143 263.9)
-
Step 900
900
#213D7C
oklch(37.6% 0.112 263.8)
-
Step 950
950
#142549
oklch(27.2% 0.071 263.4)
#234FB8 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) | #005EBC | 0.038 |
| Deuteranopia (no green cones) | #0050B6 | 0.017 |
| Tritanopia (no blue cones) | #00697B | 0.135 |
| Achromatopsia (no color) | #565656 | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #234FB8
#234FB8
oklch(46.4% 0.173 263.7)
- #725300
#725300
oklch(46.3% 0.095 83.5)
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 #234FB8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.038
- Sapphire #2138AB ΔE 0.059
- Majorelle Blue #3F37C9 ΔE 0.060
- Cobalt #1E488F ΔE 0.069
- Blue With A Hint Of Purple #533CC6 ΔE 0.069
- Blueberry #464196 ΔE 0.071
- Dusk Blue #26538D ΔE 0.072
- Mid Blue #276AB3 ΔE 0.074
Use #234FB8 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.