#23456F
Closest named color: Twilight Blue (#0A437A). oklch(38.7% 0.082 254.8), rgb(35, 69, 111).
Aa
White text reads best on this color (9.75:1).
About this color
#23456F is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.082 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.027 away. White text reads best on it, at 9.75:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.15:1 |
| White text | 9.75:1 |
Values
| HEX | #23456F |
| RGB | rgb(35, 69, 111) |
| HSL | hsl(213, 52%, 29%) |
| OKLCH | oklch(38.7% 0.082 254.8) |
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 #23456F | 9.75:1 | AAA | Lc -96.6 | Preferred for body text |
| Black text on #23456F | 2.15:1 | Fails | Lc 11.5 | Not readable |
| #23456F text on white | 9.75:1 | AAA | Lc 92.4 | Preferred for body text |
| #23456F text on black | 2.15:1 | Fails | Lc -10.0 | 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
#E2EBF6
oklch(93.7% 0.018 253.3)
-
Step 200
200
#CADBF0
oklch(88.5% 0.034 253.7)
-
Step 300
300
#A6C3E8
oklch(80.8% 0.061 254.7)
-
Step 400
400
#76A3DD
oklch(70.6% 0.099 255.1)
-
Step 500
500
#518BD4
oklch(63% 0.127 255)
-
Step 600
600
#3474C1
oklch(55.6% 0.137 254.8)
-
Step 700
700
#2661A7
oklch(49.1% 0.128 254.8)
-
Step 800
800
#214F87
oklch(42.6% 0.106 255)
-
Step 900
900 (this color)
#23456F
oklch(38.7% 0.082 254.8)
-
Step 950
950
#14273F
oklch(27% 0.052 255)
#23456F 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) | #334871 | 0.022 |
| Deuteranopia (no green cones) | #28416E | 0.012 |
| Tritanopia (no blue cones) | #004F54 | 0.067 |
| Achromatopsia (no color) | #444444 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #23456F
#23456F
oklch(38.7% 0.082 254.8)
- #5D3D00
#5D3D00
oklch(38.7% 0.081 75.6)
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 #23456F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.027
- Dark Grey Blue #29465B ΔE 0.036
- Light Navy #155084 ΔE 0.043
- Deep Sea Blue #015482 ΔE 0.050
- Charcoal #264653 ΔE 0.050
- Marine Blue #01386A ΔE 0.051
- Cobalt #1E488F ΔE 0.053
- Dusk Blue #26538D ΔE 0.060
Use #23456F 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.