#308FBB
Closest named color: Blue NCS (#118AB2). oklch(61.5% 0.109 232.9), rgb(48, 143, 187).
Aa
Black text reads best on this color (5.77:1).
About this color
#308FBB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.109 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.024 away. Black text reads best on it, at 5.77:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 5.77:1 |
| White text | 3.63:1 |
Values
| HEX | #308FBB |
| RGB | rgb(48, 143, 187) |
| HSL | hsl(199, 59%, 46%) |
| OKLCH | oklch(61.5% 0.109 232.9) |
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 #308FBB | 3.63:1 | AA large text | Lc -69.1 | Content text, not long reading |
| Black text on #308FBB | 5.77:1 | AA | Lc 40.4 | Non-text elements, placeholder text |
| #308FBB text on white | 3.63:1 | AA large text | Lc 63.6 | Content text, not long reading |
| #308FBB text on black | 5.77:1 | AA | Lc -38.0 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E0ECF3
oklch(93.6% 0.016 233)
-
Step 200
200
#C7DDEA
oklch(88.5% 0.03 233.6)
-
Step 300
300
#9FC7DE
oklch(80.9% 0.054 233.5)
-
Step 400
400
#67AACD
oklch(70.7% 0.085 232.5)
-
Step 500
500 (this color)
#308FBB
oklch(61.5% 0.109 232.9)
-
Step 600
600
#007DAB
oklch(55.5% 0.115 233.2)
-
Step 700
700
#006990
oklch(49% 0.101 232.9)
-
Step 800
800
#005677
oklch(42.6% 0.088 233.1)
-
Step 900
900
#0D4761
oklch(37.6% 0.071 233.5)
-
Step 950
950
#0B2A39
oklch(27% 0.045 233.1)
#308FBB 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) | #798EBD | 0.070 |
| Deuteranopia (no green cones) | #6680BA | 0.059 |
| Tritanopia (no blue cones) | #009B9E | 0.067 |
| Achromatopsia (no color) | #868686 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #308FBB
#308FBB
oklch(61.5% 0.109 232.9)
- #B77142
#B77142
oklch(61.5% 0.108 53.2)
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 #308FBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.024
- Cool Blue #4984B8 ΔE 0.033
- Steel Blue #4682B4 ΔE 0.037
- Off Blue #5684AE ΔE 0.040
- Dusty Blue #5A86AD ΔE 0.040
- Water Blue #0E87CC ΔE 0.042
- Faded Blue #658CBB ΔE 0.045
- Teal Blue #01889F ΔE 0.050
Use #308FBB 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.