#055FB5
Closest named color: Mid Blue (#276AB3). oklch(49% 0.155 254.4), rgb(5, 95, 181).
Aa
White text reads best on this color (6.34:1).
About this color
#055FB5 is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.155 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.037 away. White text reads best on it, at 6.34:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.155) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.31:1 |
| White text | 6.34:1 |
Values
| HEX | #055FB5 |
| RGB | rgb(5, 95, 181) |
| HSL | hsl(209, 95%, 36%) |
| OKLCH | oklch(49% 0.155 254.4) |
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 #055FB5 | 6.34:1 | AA | Lc -86.0 | Fine for body text |
| Black text on #055FB5 | 3.31:1 | AA large text | Lc 23.2 | Dividers and decoration only |
| #055FB5 text on white | 6.34:1 | AA | Lc 80.9 | Fine for body text |
| #055FB5 text on black | 3.31:1 | AA large text | Lc -21.0 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C7DBF5
oklch(88.5% 0.042 255)
-
Step 300
300
#A0C4F1
oklch(81% 0.075 254.2)
-
Step 400
400
#6AA3EA
oklch(70.6% 0.121 254.6)
-
Step 500
500
#3F8BE3
oklch(63.2% 0.153 254.1)
-
Step 600
600
#1872D1
oklch(55.5% 0.167 254.5)
-
Step 700
700 (this color)
#055FB5
oklch(49% 0.155 254.4)
-
Step 800
800
#0D4E93
oklch(42.6% 0.129 254.6)
-
Step 900
900
#154275
oklch(37.8% 0.1 254.2)
-
Step 950
950
#0E2744
oklch(27% 0.062 253.9)
#055FB5 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) | #2D67B8 | 0.033 |
| Deuteranopia (no green cones) | #0059B3 | 0.017 |
| Tritanopia (no blue cones) | #007481 | 0.115 |
| Achromatopsia (no color) | #5F5F5F | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #055FB5
#055FB5
oklch(49% 0.155 254.4)
- #825600
#825600
oklch(48.9% 0.103 74.7)
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 #055FB5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.037
- French Blue #436BAD ΔE 0.059
- Peacock Blue #016795 ΔE 0.060
- Denim Blue #3B5B92 ΔE 0.062
- Dusk Blue #26538D ΔE 0.068
- Dusky Blue #475F94 ΔE 0.068
- Ocean Blue #03719C ΔE 0.071
- Light Navy Blue #2E5A88 ΔE 0.073
Use #055FB5 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.