#23489D
Closest named color: Cobalt (#1E488F). oklch(42.7% 0.145 263.7), rgb(35, 72, 157).
Aa
White text reads best on this color (8.44:1).
About this color
#23489D is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.145 and its hue 264°. 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 8.44:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.48:1 |
| White text | 8.44:1 |
Values
| HEX | #23489D |
| RGB | rgb(35, 72, 157) |
| HSL | hsl(222, 64%, 38%) |
| OKLCH | oklch(42.7% 0.145 263.7) |
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 #23489D | 8.44:1 | AAA | Lc -93.2 | Preferred for body text |
| Black text on #23489D | 2.48:1 | Fails | Lc 15.3 | Dividers and decoration only |
| #23489D text on white | 8.44:1 | AAA | Lc 88.6 | Fine for body text |
| #23489D text on black | 2.48:1 | Fails | Lc -13.5 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EAFB
oklch(93.5% 0.025 263.3)
-
Step 200
200
#C9DAF9
oklch(88.5% 0.047 262.5)
-
Step 300
300
#A5C1F8
oklch(81% 0.084 263.6)
-
Step 400
400
#749EF5
oklch(70.6% 0.136 263.7)
-
Step 500
500
#5183F1
oklch(63% 0.174 263.8)
-
Step 600
600
#366AE0
oklch(55.7% 0.189 263.5)
-
Step 700
700
#2957C2
oklch(49% 0.175 263.6)
-
Step 800
800 (this color)
#23489D
oklch(42.7% 0.145 263.7)
-
Step 900
900
#213D7D
oklch(37.6% 0.114 264)
-
Step 950
950
#142449
oklch(26.9% 0.072 264.5)
#23489D 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) | #0653A0 | 0.030 |
| Deuteranopia (no green cones) | #00489B | 0.020 |
| Tritanopia (no blue cones) | #005D6B | 0.115 |
| Achromatopsia (no color) | #4D4D4D | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #23489D
#23489D
oklch(42.7% 0.145 263.7)
- #664A00
#664A00
oklch(42.8% 0.088 83.6)
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 #23489D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.024
- Dusk Blue #26538D ΔE 0.043
- Blueberry #464196 ΔE 0.045
- Sapphire #2138AB ΔE 0.045
- Light Navy #155084 ΔE 0.051
- Dark Slate Blue #483D8B ΔE 0.057
- Deep Sea Blue #015482 ΔE 0.062
- Twilight Blue #0A437A ΔE 0.063
Use #23489D 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.