#21598C
Closest named color: Light Navy Blue (#2E5A88). oklch(45.3% 0.102 249.4), rgb(33, 89, 140).
Aa
White text reads best on this color (7.31:1).
About this color
#21598C is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.102 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy Blue (#2E5A88), ΔE 0.013 away. White text reads best on it, at 7.31:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Light Navy Blue (#2E5A88) |
| Black text | 2.87:1 |
| White text | 7.31:1 |
Values
| HEX | #21598C |
| RGB | rgb(33, 89, 140) |
| HSL | hsl(209, 62%, 34%) |
| OKLCH | oklch(45.3% 0.102 249.4) |
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 #21598C | 7.31:1 | AAA | Lc -90.0 | Fine for body text |
| Black text on #21598C | 2.87:1 | Fails | Lc 18.9 | Dividers and decoration only |
| #21598C text on white | 7.31:1 | AAA | Lc 85.1 | Fine for body text |
| #21598C text on black | 2.87:1 | Fails | Lc -16.9 | 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 800.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C9DBEF
oklch(88.4% 0.034 251)
-
Step 300
300
#A4C4E6
oklch(80.8% 0.059 250.1)
-
Step 400
400
#71A5DA
oklch(70.6% 0.096 249.8)
-
Step 500
500
#498ED0
oklch(63.1% 0.122 249.4)
-
Step 600
600
#2877BD
oklch(55.7% 0.132 249.4)
-
Step 700
700
#1964A3
oklch(49.2% 0.123 249.1)
-
Step 800
800 (this color)
#21598C
oklch(45.3% 0.102 249.4)
-
Step 900
900
#1B446A
oklch(37.7% 0.08 249.3)
-
Step 950
950
#11283E
oklch(27% 0.05 249.3)
#21598C 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) | #425C8E | 0.036 |
| Deuteranopia (no green cones) | #32528B | 0.023 |
| Tritanopia (no blue cones) | #00656C | 0.074 |
| Achromatopsia (no color) | #565656 | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21598C
#21598C
oklch(45.3% 0.102 249.4)
- #794A00
#794A00
oklch(45.3% 0.099 68.8)
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 #21598C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy Blue #2E5A88 ΔE 0.013
- Dusk Blue #26538D ΔE 0.018
- Deep Sea Blue #015482 ΔE 0.028
- Denim Blue #3B5B92 ΔE 0.028
- Light Navy #155084 ΔE 0.031
- Peacock Blue #016795 ΔE 0.041
- Denim #3B638C ΔE 0.041
- YInMn Blue #415A77 ΔE 0.046
Use #21598C 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.