#056399
Closest named color: Peacock Blue (#016795). oklch(48% 0.115 243.3), rgb(5, 99, 153).
Aa
White text reads best on this color (6.45:1).
About this color
#056399 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.115 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Peacock Blue (#016795), ΔE 0.015 away. White text reads best on it, at 6.45:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Peacock Blue (#016795) |
| Black text | 3.25:1 |
| White text | 6.45:1 |
Values
| HEX | #056399 |
| RGB | rgb(5, 99, 153) |
| HSL | hsl(202, 94%, 31%) |
| OKLCH | oklch(48% 0.115 243.3) |
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 #056399 | 6.45:1 | AA | Lc -86.6 | Fine for body text |
| Black text on #056399 | 3.25:1 | AA large text | Lc 22.6 | Dividers and decoration only |
| #056399 text on white | 6.45:1 | AA | Lc 81.5 | Fine for body text |
| #056399 text on black | 3.25:1 | AA large text | Lc -20.4 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF4
oklch(93.5% 0.016 245.1)
-
Step 200
200
#C8DCEC
oklch(88.4% 0.031 242)
-
Step 300
300
#A2C5E2
oklch(80.8% 0.056 243.5)
-
Step 400
400
#6EA7D4
oklch(70.7% 0.089 243.3)
-
Step 500
500
#4490C9
oklch(63% 0.114 243.8)
-
Step 600
600
#1E7AB6
oklch(55.7% 0.124 243.3)
-
Step 700
700 (this color)
#056399
oklch(48% 0.115 243.3)
-
Step 800
800
#11537F
oklch(42.6% 0.096 244)
-
Step 900
900
#184566
oklch(37.6% 0.075 244.1)
-
Step 950
950
#0F293C
oklch(27.1% 0.048 243)
#056399 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) | #49659B | 0.051 |
| Deuteranopia (no green cones) | #355998 | 0.036 |
| Tritanopia (no blue cones) | #007077 | 0.077 |
| Achromatopsia (no color) | #5E5E5E | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #056399
#056399
oklch(48% 0.115 243.3)
- #884E00
#884E00
oklch(48.2% 0.109 63.6)
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 #056399, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Peacock Blue #016795 ΔE 0.015
- Light Navy Blue #2E5A88 ΔE 0.036
- Denim Blue #3B5B92 ΔE 0.037
- Denim #3B638C ΔE 0.038
- Ocean Blue #03719C ΔE 0.042
- Dusky Blue #475F94 ΔE 0.046
- Dusk Blue #26538D ΔE 0.047
- Mid Blue #276AB3 ΔE 0.049
Use #056399 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.