#005BBB
Closest named color: Mid Blue (#276AB3). oklch(48.5% 0.168 256.4), rgb(0, 91, 187).
Aa
White text reads best on this color (6.53:1).
About this color
#005BBB is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.168 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.050 away. White text reads best on it, at 6.53:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.168) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.21:1 |
| White text | 6.53:1 |
Values
| HEX | #005BBB |
| RGB | rgb(0, 91, 187) |
| HSL | hsl(211, 100%, 37%) |
| OKLCH | oklch(48.5% 0.168 256.4) |
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 #005BBB | 6.53:1 | AA | Lc -86.7 | Fine for body text |
| Black text on #005BBB | 3.21:1 | AA large text | Lc 22.5 | Dividers and decoration only |
| #005BBB text on white | 6.53:1 | AA | Lc 81.6 | Fine for body text |
| #005BBB text on black | 3.21:1 | AA large text | Lc -20.3 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C6DBF7
oklch(88.5% 0.045 255.6)
-
Step 300
300
#9FC3F5
oklch(80.9% 0.081 256.7)
-
Step 400
400
#69A2F1
oklch(70.7% 0.131 256.8)
-
Step 500
500
#3D89EC
oklch(63.2% 0.167 256.3)
-
Step 600
600
#1670DA
oklch(55.6% 0.181 256.4)
-
Step 700
700 (this color)
#005BBB
oklch(48.5% 0.168 256.4)
-
Step 800
800
#0B4C99
oklch(42.6% 0.14 256.6)
-
Step 900
900
#14417A
oklch(37.8% 0.109 256.3)
-
Step 950
950
#0D2647
oklch(26.9% 0.069 256.4)
#005BBB 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) | #1766BE | 0.032 |
| Deuteranopia (no green cones) | #0056B9 | 0.013 |
| Tritanopia (no blue cones) | #007382 | 0.127 |
| Achromatopsia (no color) | #5E5E5E | 0.168 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #005BBB
#005BBB
oklch(48.5% 0.168 256.4)
- #7F5600
#7F5600
oklch(48.5% 0.102 76.8)
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 #005BBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.050
- Blue Blue #2242C7 ΔE 0.061
- French Blue #436BAD ΔE 0.071
- Denim Blue #3B5B92 ΔE 0.073
- Dusk Blue #26538D ΔE 0.074
- Peacock Blue #016795 ΔE 0.075
- Warm Blue #4B57DB ΔE 0.075
- Azul #1D5DEC ΔE 0.078
Use #005BBB 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.