#23429E
Closest named color: Cobalt (#1E488F). oklch(41.5% 0.154 265.7), rgb(35, 66, 158).
Aa
White text reads best on this color (8.95:1).
About this color
#23429E is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.154 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.030 away. White text reads best on it, at 8.95:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.34:1 |
| White text | 8.95:1 |
Values
| HEX | #23429E |
| RGB | rgb(35, 66, 158) |
| HSL | hsl(225, 64%, 38%) |
| OKLCH | oklch(41.5% 0.154 265.7) |
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 #23429E | 8.95:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #23429E | 2.34:1 | Fails | Lc 13.9 | Not readable |
| #23429E text on white | 8.95:1 | AAA | Lc 90.0 | Preferred for body text |
| #23429E 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
#E2EAFC
oklch(93.6% 0.026 266.6)
-
Step 200
200
#C9D9FB
oklch(88.4% 0.05 265.4)
-
Step 300
300
#A5C0FC
oklch(80.9% 0.09 265.7)
-
Step 400
400
#769DFA
oklch(70.8% 0.143 265.7)
-
Step 500
500
#5481F7
oklch(63.2% 0.183 265.7)
-
Step 600
600
#3A66E6
oklch(55.5% 0.2 265.7)
-
Step 700
700
#2D54C8
oklch(49.1% 0.186 265.6)
-
Step 800
800 (this color)
#23429E
oklch(41.5% 0.154 265.7)
-
Step 900
900
#233C80
oklch(37.7% 0.119 265.7)
-
Step 950
950
#14244B
oklch(27.1% 0.075 265)
#23429E 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) | #004FA1 | 0.035 |
| Deuteranopia (no green cones) | #00449C | 0.020 |
| Tritanopia (no blue cones) | #005969 | 0.121 |
| Achromatopsia (no color) | #494949 | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #23429E
#23429E
oklch(41.5% 0.154 265.7)
- #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 #23429E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.030
- Sapphire #2138AB ΔE 0.032
- Blueberry #464196 ΔE 0.046
- Dark Slate Blue #483D8B ΔE 0.057
- Dusk Blue #26538D ΔE 0.058
- Light Navy #155084 ΔE 0.061
- Twilight Blue #0A437A ΔE 0.064
- Blue Blue #2242C7 ΔE 0.066
Use #23429E 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.