#105FAF
Closest named color: Mid Blue (#276AB3). oklch(48.7% 0.146 254), rgb(16, 95, 175).
Aa
White text reads best on this color (6.40:1).
About this color
#105FAF is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.146 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.036 away. White text reads best on it, at 6.40:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.146) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.27:1 |
| White text | 6.40:1 |
Values
| HEX | #105FAF |
| RGB | rgb(16, 95, 175) |
| HSL | hsl(210, 83%, 37%) |
| OKLCH | oklch(48.7% 0.146 254) |
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 #105FAF | 6.40:1 | AA | Lc -86.4 | Fine for body text |
| Black text on #105FAF | 3.27:1 | AA large text | Lc 22.8 | Dividers and decoration only |
| #105FAF text on white | 6.40:1 | AA | Lc 81.3 | Fine for body text |
| #105FAF text on black | 3.27:1 | AA large text | Lc -20.6 | 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
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C8DBF3
oklch(88.5% 0.039 254.3)
-
Step 300
300
#A1C4EE
oklch(80.9% 0.071 253.2)
-
Step 400
400
#6EA4E6
oklch(70.8% 0.113 254.1)
-
Step 500
500
#448BDE
oklch(63% 0.144 254)
-
Step 600
600
#2173CC
oklch(55.5% 0.157 254.2)
-
Step 700
700 (this color)
#105FAF
oklch(48.7% 0.146 254)
-
Step 800
800
#144F8F
oklch(42.7% 0.121 254.1)
-
Step 900
900
#184272
oklch(37.7% 0.095 254)
-
Step 950
950
#102743
oklch(27% 0.06 254.6)
#105FAF 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) | #3366B2 | 0.033 |
| Deuteranopia (no green cones) | #0958AD | 0.020 |
| Tritanopia (no blue cones) | #00727E | 0.108 |
| Achromatopsia (no color) | #5F5F5F | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #105FAF
#105FAF
oklch(48.7% 0.146 254)
- #825500
#825500
oklch(48.7% 0.103 73.8)
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 #105FAF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.036
- Peacock Blue #016795 ΔE 0.052
- Denim Blue #3B5B92 ΔE 0.052
- French Blue #436BAD ΔE 0.055
- Dusk Blue #26538D ΔE 0.059
- Dusky Blue #475F94 ΔE 0.060
- Light Navy Blue #2E5A88 ΔE 0.063
- Ocean Blue #03719C ΔE 0.065
Use #105FAF 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.