#216DA4
Closest named color: Ocean Blue (#03719C). oklch(51.6% 0.113 244.9), rgb(33, 109, 164).
Aa
White text reads best on this color (5.54:1).
About this color
#216DA4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.113 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean Blue (#03719C), ΔE 0.022 away. White text reads best on it, at 5.54:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | Ocean Blue (#03719C) |
| Black text | 3.78:1 |
| White text | 5.54:1 |
Values
| HEX | #216DA4 |
| RGB | rgb(33, 109, 164) |
| HSL | hsl(205, 66%, 39%) |
| OKLCH | oklch(51.6% 0.113 244.9) |
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 #216DA4 | 5.54:1 | AA | Lc -82.6 | Fine for body text |
| Black text on #216DA4 | 3.78:1 | AA large text | Lc 26.7 | Dividers and decoration only |
| #216DA4 text on white | 5.54:1 | AA | Lc 77.3 | Fine for body text |
| #216DA4 text on black | 3.78:1 | AA large text | Lc -24.4 | Dividers and decoration only |
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 700.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E1EBF4
oklch(93.5% 0.016 245.1)
-
Step 200
200
#C9DCEC
oklch(88.5% 0.03 243.4)
-
Step 300
300
#A4C5E2
oklch(80.9% 0.054 245.1)
-
Step 400
400
#71A7D4
oklch(70.8% 0.087 244.6)
-
Step 500
500
#4890C8
oklch(63.1% 0.111 244.4)
-
Step 600
600
#2679B5
oklch(55.6% 0.121 244.8)
-
Step 700
700 (this color)
#216DA4
oklch(51.6% 0.113 244.9)
-
Step 800
800
#17537E
oklch(42.7% 0.093 244.7)
-
Step 900
900
#1B4566
oklch(37.8% 0.073 245.3)
-
Step 950
950
#11293B
oklch(27.1% 0.045 243.2)
#216DA4 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) | #536FA6 | 0.047 |
| Deuteranopia (no green cones) | #4163A3 | 0.035 |
| Tritanopia (no blue cones) | #007A81 | 0.078 |
| Achromatopsia (no color) | #686868 | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #216DA4
#216DA4
oklch(51.6% 0.113 244.9)
- #935808
#935808
oklch(51.6% 0.113 65.3)
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 #216DA4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean Blue #03719C ΔE 0.022
- Muted Blue #3B719F ΔE 0.026
- Mid Blue #276AB3 ΔE 0.027
- Flat Blue #3C73A8 ΔE 0.029
- Peacock Blue #016795 ΔE 0.032
- French Blue #436BAD ΔE 0.033
- Sea Blue #047495 ΔE 0.037
- Nice Blue #107AB0 ΔE 0.038
Use #216DA4 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.