#23439A
Closest named color: Cobalt (#1E488F). oklch(41.4% 0.147 265.2), rgb(35, 67, 154).
Aa
White text reads best on this color (8.97:1).
About this color
#23439A is a dark, vivid blue. In OKLCH its lightness is 41%, its chroma 0.147 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.024 away. White text reads best on it, at 8.97:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | vivid (0.147) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.34:1 |
| White text | 8.97:1 |
Values
| HEX | #23439A |
| RGB | rgb(35, 67, 154) |
| HSL | hsl(224, 63%, 37%) |
| OKLCH | oklch(41.4% 0.147 265.2) |
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 #23439A | 8.97:1 | AAA | Lc -94.6 | Preferred for body text |
| Black text on #23439A | 2.34:1 | Fails | Lc 13.9 | Not readable |
| #23439A text on white | 8.97:1 | AAA | Lc 90.1 | Preferred for body text |
| #23439A text on black | 2.34:1 | Fails | Lc -12.2 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CAD9FA
oklch(88.5% 0.048 266)
-
Step 300
300
#A6C0F9
oklch(80.9% 0.086 265.5)
-
Step 400
400
#769DF6
oklch(70.6% 0.138 265.1)
-
Step 500
500
#5482F3
oklch(63.1% 0.177 265.1)
-
Step 600
600
#3B68E1
oklch(55.5% 0.191 265.2)
-
Step 700
700
#2E56C4
oklch(49.2% 0.178 265.2)
-
Step 800
800 (this color)
#23439A
oklch(41.4% 0.147 265.2)
-
Step 900
900
#233D7E
oklch(37.8% 0.115 265)
-
Step 950
950
#15244A
oklch(27% 0.073 265.6)
#23439A 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) | #004F9D | 0.033 |
| Deuteranopia (no green cones) | #004498 | 0.021 |
| Tritanopia (no blue cones) | #005868 | 0.114 |
| Achromatopsia (no color) | #494949 | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #23439A
#23439A
oklch(41.4% 0.147 265.2)
- #604700
#604700
oklch(41.4% 0.085 85.5)
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 #23439A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.024
- Sapphire #2138AB ΔE 0.038
- Blueberry #464196 ΔE 0.045
- Dusk Blue #26538D ΔE 0.052
- Dark Slate Blue #483D8B ΔE 0.054
- Light Navy #155084 ΔE 0.055
- Twilight Blue #0A437A ΔE 0.058
- Deep Sea Blue #015482 ΔE 0.067
Use #23439A 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.