#216C99
Closest named color: Ocean Blue (#03719C). oklch(50.8% 0.101 240), rgb(33, 108, 153).
Aa
White text reads best on this color (5.72:1).
About this color
#216C99 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.101 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean Blue (#03719C), ΔE 0.016 away. White text reads best on it, at 5.72:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | Ocean Blue (#03719C) |
| Black text | 3.66:1 |
| White text | 5.72:1 |
Values
| HEX | #216C99 |
| RGB | rgb(33, 108, 153) |
| HSL | hsl(203, 65%, 36%) |
| OKLCH | oklch(50.8% 0.101 240) |
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 #216C99 | 5.72:1 | AA | Lc -83.6 | Fine for body text |
| Black text on #216C99 | 3.66:1 | AA large text | Lc 25.8 | Dividers and decoration only |
| #216C99 text on white | 5.72:1 | AA | Lc 78.3 | Fine for body text |
| #216C99 text on black | 3.66:1 | AA large text | Lc -23.5 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#CADCEA
oklch(88.5% 0.027 241.2)
-
Step 300
300
#A5C6DD
oklch(81% 0.048 238.6)
-
Step 400
400
#73A7CD
oklch(70.6% 0.078 241)
-
Step 500
500
#4B91C0
oklch(63.1% 0.1 240.3)
-
Step 600
600
#297BAC
oklch(55.7% 0.108 239.6)
-
Step 700
700 (this color)
#216C99
oklch(50.8% 0.101 240)
-
Step 800
800
#195478
oklch(42.6% 0.084 240.2)
-
Step 900
900
#1C4661
oklch(37.8% 0.066 240)
-
Step 950
950
#122939
oklch(27% 0.042 241)
#216C99 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) | #576C9B | 0.052 |
| Deuteranopia (no green cones) | #466198 | 0.042 |
| Tritanopia (no blue cones) | #00777C | 0.067 |
| Achromatopsia (no color) | #666666 | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #216C99
#216C99
oklch(50.8% 0.101 240)
- #8F5620
#8F5620
oklch(50.8% 0.101 60.2)
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 #216C99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean Blue #03719C ΔE 0.016
- Peacock Blue #016795 ΔE 0.021
- Sea Blue #047495 ΔE 0.027
- Muted Blue #3B719F ΔE 0.028
- Denim #3B638C ΔE 0.032
- Flat Blue #3C73A8 ΔE 0.038
- Mid Blue #276AB3 ΔE 0.044
- French Blue #436BAD ΔE 0.045
Use #216C99 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.