#23406E
Closest named color: Twilight Blue (#0A437A). oklch(37.4% 0.087 259.3), rgb(35, 64, 110).
Aa
White text reads best on this color (10.34:1).
About this color
#23406E is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.087 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.025 away. White text reads best on it, at 10.34:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.02:1 |
| White text | 10.34:1 |
Values
| HEX | #23406E |
| RGB | rgb(35, 64, 110) |
| HSL | hsl(217, 52%, 28%) |
| OKLCH | oklch(37.4% 0.087 259.3) |
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 #23406E | 10.34:1 | AAA | Lc -97.9 | Preferred for body text |
| Black text on #23406E | 2.02:1 | Fails | Lc 10.1 | Not readable |
| #23406E text on white | 10.34:1 | AAA | Lc 93.8 | Preferred for body text |
| #23406E text on black | 2.02:1 | Fails | Lc -8.7 | 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 900.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CBDAF2
oklch(88.5% 0.037 259.8)
-
Step 300
300
#A8C2EB
oklch(80.9% 0.065 259.4)
-
Step 400
400
#79A2E1
oklch(70.8% 0.103 258.8)
-
Step 500
500
#5689D9
oklch(63.1% 0.133 259.1)
-
Step 600
600
#3B71C6
oklch(55.5% 0.144 259.2)
-
Step 700
700
#2E5EAC
oklch(49.1% 0.135 259.7)
-
Step 800
800
#274D8B
oklch(42.6% 0.112 259.7)
-
Step 900
900 (this color)
#23406E
oklch(37.4% 0.087 259.3)
-
Step 950
950
#152641
oklch(26.9% 0.056 259.3)
#23406E 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) | #2B4470 | 0.017 |
| Deuteranopia (no green cones) | #203D6D | 0.010 |
| Tritanopia (no blue cones) | #004B51 | 0.073 |
| Achromatopsia (no color) | #404040 | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #23406E
#23406E
oklch(37.4% 0.087 259.3)
- #563B00
#563B00
oklch(37.3% 0.077 79.7)
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 #23406E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.025
- Marine Blue #01386A ΔE 0.039
- Dark Grey Blue #29465B ΔE 0.043
- Prussian Blue #1D3557 ΔE 0.050
- Light Navy #155084 ΔE 0.054
- Charcoal #264653 ΔE 0.055
- Cobalt #1E488F ΔE 0.057
- Dark Blue Grey #1F3B4D ΔE 0.058
Use #23406E 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.