#233565
Closest named color: Prussian Blue (#1D3557). oklch(34.1% 0.087 266.4), rgb(35, 53, 101).
Aa
White text reads best on this color (11.87:1).
About this color
#233565 is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.087 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.027 away. White text reads best on it, at 11.87:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.76:1 |
| White text | 11.87:1 |
Values
| HEX | #233565 |
| RGB | rgb(35, 53, 101) |
| HSL | hsl(224, 49%, 27%) |
| OKLCH | oklch(34.1% 0.087 266.4) |
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 #233565 | 11.87:1 | AAA | Lc -100.6 | Preferred for body text |
| Black text on #233565 | 1.76:1 | Fails | Lc 0.0 | Not readable |
| #233565 text on white | 11.87:1 | AAA | Lc 97.0 | Preferred for body text |
| #233565 text on black | 1.76:1 | Fails | Lc 0.0 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CED9F2
oklch(88.5% 0.036 266.7)
-
Step 300
300
#ADC0EC
oklch(80.8% 0.066 266.6)
-
Step 400
400
#829FE2
oklch(70.7% 0.104 265.9)
-
Step 500
500
#6485DA
oklch(63% 0.134 266.6)
-
Step 600
600
#4C6DC8
oklch(55.6% 0.146 266.7)
-
Step 700
700
#3D5BAD
oklch(49.2% 0.135 266.4)
-
Step 800
800
#324B8C
oklch(42.8% 0.112 266)
-
Step 900
900 (this color)
#233565
oklch(34.1% 0.087 266.4)
-
Step 950
950
#1A2541
oklch(27% 0.055 266.6)
#233565 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) | #1F3A67 | 0.015 |
| Deuteranopia (no green cones) | #143464 | 0.017 |
| Tritanopia (no blue cones) | #004048 | 0.075 |
| Achromatopsia (no color) | #373737 | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #233565
#233565
oklch(34.1% 0.087 266.4)
- #483500
#483500
oklch(34.1% 0.07 86.3)
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 #233565, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.027
- Marine Blue #01386A ΔE 0.027
- Marine #042E60 ΔE 0.040
- Twilight Blue #0A437A ΔE 0.051
- Dark Blue Grey #1F3B4D ΔE 0.051
- Midnight Green #073B4C ΔE 0.058
- Dark Grey Blue #29465B ΔE 0.062
- Space Cadet #2B2D42 ΔE 0.063
Use #233565 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.