#234FA0
Closest named color: Cobalt (#1E488F). oklch(44.4% 0.14 261.3), rgb(35, 79, 160).
Aa
White text reads best on this color (7.78:1).
About this color
#234FA0 is a dark, vivid blue. In OKLCH its lightness is 44%, its chroma 0.140 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.033 away. White text reads best on it, at 7.78:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | vivid (0.140) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.69:1 |
| White text | 7.78:1 |
Values
| HEX | #234FA0 |
| RGB | rgb(35, 79, 160) |
| HSL | hsl(219, 64%, 38%) |
| OKLCH | oklch(44.4% 0.14 261.3) |
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 #234FA0 | 7.78:1 | AAA | Lc -91.4 | Preferred for body text |
| Black text on #234FA0 | 2.69:1 | Fails | Lc 17.4 | Dividers and decoration only |
| #234FA0 text on white | 7.78:1 | AAA | Lc 86.6 | Fine for body text |
| #234FA0 text on black | 2.69:1 | Fails | Lc -15.5 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EAFA
oklch(93.5% 0.024 262.1)
-
Step 200
200
#C9DAF8
oklch(88.5% 0.045 261.9)
-
Step 300
300
#A3C2F6
oklch(81% 0.081 260.6)
-
Step 400
400
#71A0F2
oklch(70.7% 0.131 261)
-
Step 500
500
#4C85ED
oklch(63% 0.168 261.3)
-
Step 600
600
#306CDC
oklch(55.6% 0.183 261.5)
-
Step 700
700
#235ABF
oklch(49.2% 0.169 261.3)
-
Step 800
800 (this color)
#234FA0
oklch(44.4% 0.14 261.3)
-
Step 900
900
#1E3F7B
oklch(37.8% 0.109 261.2)
-
Step 950
950
#122548
oklch(27% 0.07 261.5)
#234FA0 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) | #1E58A3 | 0.024 |
| Deuteranopia (no green cones) | #004D9E | 0.020 |
| Tritanopia (no blue cones) | #006270 | 0.108 |
| Achromatopsia (no color) | #525252 | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #234FA0
#234FA0
oklch(44.4% 0.14 261.3)
- #6D4D00
#6D4D00
oklch(44.3% 0.092 81.1)
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 #234FA0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.033
- Dusk Blue #26538D ΔE 0.035
- Light Navy #155084 ΔE 0.049
- Blueberry #464196 ΔE 0.052
- Denim Blue #3B5B92 ΔE 0.052
- Light Navy Blue #2E5A88 ΔE 0.056
- Deep Sea Blue #015482 ΔE 0.057
- Sapphire #2138AB ΔE 0.060
Use #234FA0 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.