#217598
Closest named color: Sea Blue (#047495). oklch(53% 0.094 230.7), rgb(33, 117, 152).
Aa
White text reads best on this color (5.16:1).
About this color
#217598 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.094 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Sea Blue (#047495), ΔE 0.012 away. White text reads best on it, at 5.16:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 4.06:1 |
| White text | 5.16:1 |
Values
| HEX | #217598 |
| RGB | rgb(33, 117, 152) |
| HSL | hsl(198, 64%, 36%) |
| OKLCH | oklch(53% 0.094 230.7) |
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 #217598 | 5.16:1 | AA | Lc -80.6 | Fine for body text |
| Black text on #217598 | 4.06:1 | AA large text | Lc 28.8 | Dividers and decoration only |
| #217598 text on white | 5.16:1 | AA | Lc 75.3 | Fine for body text |
| #217598 text on black | 4.06:1 | AA large text | Lc -26.5 | 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 600.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2ECF1
oklch(93.7% 0.013 228.9)
-
Step 200
200
#CADCE6
oklch(88.4% 0.024 231.9)
-
Step 300
300
#A6C6D7
oklch(80.9% 0.042 231.1)
-
Step 400
400
#74A9C3
oklch(70.7% 0.068 230.1)
-
Step 500
500
#4C93B4
oklch(63.1% 0.087 230.4)
-
Step 600
600 (this color)
#217598
oklch(53% 0.094 230.7)
-
Step 700
700
#1C6989
oklch(49% 0.088 230.8)
-
Step 800
800
#1B566F
oklch(42.7% 0.072 230.2)
-
Step 900
900
#1D475A
oklch(37.7% 0.057 230.4)
-
Step 950
950
#122A35
oklch(27.1% 0.036 229.8)
#217598 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) | #63739A | 0.064 |
| Deuteranopia (no green cones) | #536897 | 0.054 |
| Tritanopia (no blue cones) | #007F81 | 0.056 |
| Achromatopsia (no color) | #6D6D6D | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #217598
#217598
oklch(53% 0.094 230.7)
- #975A36
#975A36
oklch(52.9% 0.095 50.1)
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 #217598, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.012
- Ocean Blue #03719C ΔE 0.019
- Ocean #017B92 ΔE 0.024
- Muted Blue #3B719F ΔE 0.026
- Dull Blue #49759C ΔE 0.033
- Flat Blue #3C73A8 ΔE 0.035
- Cerulean #457B9D ΔE 0.036
- Nice Blue #107AB0 ΔE 0.037
Use #217598 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.