#216D9F
Closest named color: Ocean Blue (#03719C). oklch(51.4% 0.107 242.5), rgb(33, 109, 159).
Aa
White text reads best on this color (5.59:1).
About this color
#216D9F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.107 and its hue 242°. 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 5.59:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Ocean Blue (#03719C) |
| Black text | 3.75:1 |
| White text | 5.59:1 |
Values
| HEX | #216D9F |
| RGB | rgb(33, 109, 159) |
| HSL | hsl(204, 66%, 38%) |
| OKLCH | oklch(51.4% 0.107 242.5) |
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 #216D9F | 5.59:1 | AA | Lc -82.9 | Fine for body text |
| Black text on #216D9F | 3.75:1 | AA large text | Lc 26.5 | Dividers and decoration only |
| #216D9F text on white | 5.59:1 | AA | Lc 77.6 | Fine for body text |
| #216D9F text on black | 3.75:1 | AA large text | Lc -24.2 | 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
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#C9DCEB
oklch(88.5% 0.029 241.6)
-
Step 300
300
#A4C5E0
oklch(80.8% 0.052 243.1)
-
Step 400
400
#72A7D0
oklch(70.7% 0.082 242.6)
-
Step 500
500
#4990C4
oklch(63% 0.106 242.7)
-
Step 600
600
#277AB1
oklch(55.7% 0.115 242.5)
-
Step 700
700 (this color)
#216D9F
oklch(51.4% 0.107 242.5)
-
Step 800
800
#18547B
oklch(42.8% 0.088 242.1)
-
Step 900
900
#1B4563
oklch(37.6% 0.069 242.8)
-
Step 950
950
#11293A
oklch(27% 0.044 241.7)
#216D9F 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) | #566EA1 | 0.051 |
| Deuteranopia (no green cones) | #44639E | 0.038 |
| Tritanopia (no blue cones) | #00797F | 0.072 |
| Achromatopsia (no color) | #686868 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #216D9F
#216D9F
oklch(51.4% 0.107 242.5)
- #925717
#925717
oklch(51.4% 0.108 62.2)
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 #216D9F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean Blue #03719C ΔE 0.016
- Muted Blue #3B719F ΔE 0.025
- Peacock Blue #016795 ΔE 0.027
- Sea Blue #047495 ΔE 0.031
- Flat Blue #3C73A8 ΔE 0.032
- Mid Blue #276AB3 ΔE 0.035
- French Blue #436BAD ΔE 0.038
- Denim #3B638C ΔE 0.039
Use #216D9F 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.