#234FA1
Closest named color: Cobalt (#1E488F). oklch(44.5% 0.142 261.4), rgb(35, 79, 161).
Aa
White text reads best on this color (7.76:1).
About this color
#234FA1 is a dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.142 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.035 away. White text reads best on it, at 7.76:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.70:1 |
| White text | 7.76:1 |
Values
| HEX | #234FA1 |
| RGB | rgb(35, 79, 161) |
| HSL | hsl(219, 64%, 38%) |
| OKLCH | oklch(44.5% 0.142 261.4) |
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 #234FA1 | 7.76:1 | AAA | Lc -91.3 | Preferred for body text |
| Black text on #234FA1 | 2.70:1 | Fails | Lc 17.5 | Dividers and decoration only |
| #234FA1 text on white | 7.76:1 | AAA | Lc 86.5 | Fine for body text |
| #234FA1 text on black | 2.70:1 | Fails | Lc -15.6 | 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
#C8DAF8
oklch(88.4% 0.046 260.7)
-
Step 300
300
#A3C1F7
oklch(80.8% 0.084 262)
-
Step 400
400
#71A0F3
oklch(70.8% 0.132 261.2)
-
Step 500
500
#4C85EE
oklch(63% 0.169 261.4)
-
Step 600
600
#2F6CDD
oklch(55.6% 0.184 261.4)
-
Step 700
700
#2259C0
oklch(49% 0.172 261.5)
-
Step 800
800 (this color)
#234FA1
oklch(44.5% 0.142 261.4)
-
Step 900
900
#1E3E7B
oklch(37.6% 0.111 261.8)
-
Step 950
950
#122548
oklch(27% 0.07 261.5)
#234FA1 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) | #1C59A4 | 0.027 |
| Deuteranopia (no green cones) | #004D9F | 0.020 |
| Tritanopia (no blue cones) | #006370 | 0.112 |
| Achromatopsia (no color) | #525252 | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #234FA1
#234FA1
oklch(44.5% 0.142 261.4)
- #6D4E00
#6D4E00
oklch(44.6% 0.092 82.2)
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 #234FA1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.035
- Dusk Blue #26538D ΔE 0.036
- Light Navy #155084 ΔE 0.050
- Blueberry #464196 ΔE 0.052
- Denim Blue #3B5B92 ΔE 0.053
- Light Navy Blue #2E5A88 ΔE 0.057
- Deep Sea Blue #015482 ΔE 0.059
- Sapphire #2138AB ΔE 0.060
Use #234FA1 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.