#107BB1
Closest named color: Nice Blue (#107AB0). oklch(55.5% 0.12 238.9), rgb(16, 123, 177).
Aa
White text reads best on this color (4.67:1).
About this color
#107BB1 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.120 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Nice Blue (#107AB0), ΔE 0.003 away. White text reads best on it, at 4.67:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Nice Blue (#107AB0) |
| Black text | 4.49:1 |
| White text | 4.67:1 |
Values
| HEX | #107BB1 |
| RGB | rgb(16, 123, 177) |
| HSL | hsl(200, 83%, 38%) |
| OKLCH | oklch(55.5% 0.12 238.9) |
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 #107BB1 | 4.67:1 | AA | Lc -77.4 | Fine for body text |
| Black text on #107BB1 | 4.49:1 | AA large text | Lc 32.1 | Non-text elements, placeholder text |
| #107BB1 text on white | 4.67:1 | AA | Lc 72.0 | Content text, not long reading |
| #107BB1 text on black | 4.49:1 | AA large text | Lc -29.7 | 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 600.
-
Step 50
50
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1ECF3
oklch(93.7% 0.015 235.4)
-
Step 200
200
#C8DCEB
oklch(88.4% 0.03 240.2)
-
Step 300
300
#A1C6E0
oklch(80.8% 0.054 239)
-
Step 400
400
#6CA8D1
oklch(70.6% 0.087 239.5)
-
Step 500
500
#3F92C5
oklch(63.1% 0.111 239)
-
Step 600
600 (this color)
#107BB1
oklch(55.5% 0.12 238.9)
-
Step 700
700
#006898
oklch(49.2% 0.11 238.7)
-
Step 800
800
#08557C
oklch(42.8% 0.093 238.9)
-
Step 900
900
#144663
oklch(37.6% 0.072 238.7)
-
Step 950
950
#0E293A
oklch(26.9% 0.046 239.3)
#107BB1 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) | #617CB3 | 0.064 |
| Deuteranopia (no green cones) | #4C6EB0 | 0.050 |
| Tritanopia (no blue cones) | #00898E | 0.079 |
| Achromatopsia (no color) | #747474 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #107BB1
#107BB1
oklch(55.5% 0.12 238.9)
- #A65F1A
#A65F1A
oklch(55.6% 0.121 58.9)
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 #107BB1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Nice Blue #107AB0 ΔE 0.003
- Flat Blue #3C73A8 ΔE 0.030
- Windows Blue #3778BF ΔE 0.033
- Muted Blue #3B719F ΔE 0.038
- Ocean Blue #03719C ΔE 0.041
- Steel Blue #4682B4 ΔE 0.041
- Cerulean #457B9D ΔE 0.042
- Blue NCS #118AB2 ΔE 0.044
Use #107BB1 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.