#213683
Closest named color: Twilight Blue (#0A437A). oklch(36.6% 0.132 267.7), rgb(33, 54, 131).
Aa
White text reads best on this color (10.93:1).
About this color
#213683 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.132 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.042 away. White text reads best on it, at 10.93:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.92:1 |
| White text | 10.93:1 |
Values
| HEX | #213683 |
| RGB | rgb(33, 54, 131) |
| HSL | hsl(227, 60%, 32%) |
| OKLCH | oklch(36.6% 0.132 267.7) |
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 #213683 | 10.93:1 | AAA | Lc -98.8 | Preferred for body text |
| Black text on #213683 | 1.92:1 | Fails | Lc 9.0 | Not readable |
| #213683 text on white | 10.93:1 | AAA | Lc 94.9 | Preferred for body text |
| #213683 text on black | 1.92:1 | Fails | Lc -7.7 | 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
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFE
oklch(93.6% 0.029 266.4)
-
Step 200
200
#C9D9FF
oklch(88.6% 0.055 267.2)
-
Step 300
300
#A6BFFF
oklch(80.9% 0.095 267.8)
-
Step 400
400
#779BFF
oklch(70.7% 0.152 267.5)
-
Step 500
500
#567DFF
oklch(63% 0.198 267.8)
-
Step 600
600
#3D61F1
oklch(55.6% 0.219 267.7)
-
Step 700
700
#304FD2
oklch(49.1% 0.204 267.6)
-
Step 800
800
#2842AA
oklch(42.8% 0.169 267.7)
-
Step 900
900 (this color)
#213683
oklch(36.6% 0.132 267.7)
-
Step 950
950
#15224F
oklch(27% 0.084 268.2)
#213683 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) | #004186 | 0.033 |
| Deuteranopia (no green cones) | #003881 | 0.023 |
| Tritanopia (no blue cones) | #004957 | 0.105 |
| Achromatopsia (no color) | #3D3D3D | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #213683
#213683
oklch(36.6% 0.132 267.7)
- #4F3C00
#4F3C00
oklch(36.7% 0.075 88.5)
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 #213683, closest first.
No curated palette has a color within ΔE 0.04 of #213683.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.042
- Marine Blue #01386A ΔE 0.051
- Cobalt #1E488F ΔE 0.051
- Dark Slate Blue #483D8B ΔE 0.064
- Sapphire #2138AB ΔE 0.066
- Blueberry #464196 ΔE 0.070
- Marine #042E60 ΔE 0.071
- Light Navy #155084 ΔE 0.073
Use #213683 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.