#1979B3
Closest named color: Nice Blue (#107AB0). oklch(55.2% 0.122 242), rgb(25, 121, 179).
Aa
White text reads best on this color (4.74:1).
About this color
#1979B3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.122 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Nice Blue (#107AB0), ΔE 0.007 away. White text reads best on it, at 4.74:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Nice Blue (#107AB0) |
| Black text | 4.42:1 |
| White text | 4.74:1 |
Values
| HEX | #1979B3 |
| RGB | rgb(25, 121, 179) |
| HSL | hsl(203, 75%, 40%) |
| OKLCH | oklch(55.2% 0.122 242) |
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 #1979B3 | 4.74:1 | AA | Lc -77.9 | Fine for body text |
| Black text on #1979B3 | 4.42:1 | AA large text | Lc 31.6 | Non-text elements, placeholder text |
| #1979B3 text on white | 4.74:1 | AA | Lc 72.5 | Content text, not long reading |
| #1979B3 text on black | 4.42:1 | AA large text | Lc -29.2 | 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
#E1EBF4
oklch(93.5% 0.016 245.1)
-
Step 200
200
#C8DCEC
oklch(88.4% 0.031 242)
-
Step 300
300
#A2C6E2
oklch(81% 0.055 241.8)
-
Step 400
400
#6EA7D3
oklch(70.6% 0.088 242.7)
-
Step 500
500
#4391C7
oklch(63.1% 0.112 241.8)
-
Step 600
600 (this color)
#1979B3
oklch(55.2% 0.122 242)
-
Step 700
700
#08679B
oklch(49.2% 0.113 241.7)
-
Step 800
800
#0F547E
oklch(42.8% 0.094 242.1)
-
Step 900
900
#174665
oklch(37.8% 0.073 241.6)
-
Step 950
950
#0F293B
oklch(27% 0.046 241.6)
#1979B3 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) | #5D7AB6 | 0.057 |
| Deuteranopia (no green cones) | #486DB2 | 0.043 |
| Tritanopia (no blue cones) | #00878E | 0.081 |
| Achromatopsia (no color) | #737373 | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1979B3
#1979B3
oklch(55.2% 0.122 242)
- #A45F0E
#A45F0E
oklch(55.3% 0.123 61.9)
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 #1979B3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Nice Blue #107AB0 ΔE 0.007
- Flat Blue #3C73A8 ΔE 0.027
- Windows Blue #3778BF ΔE 0.027
- Muted Blue #3B719F ΔE 0.037
- Ocean Blue #03719C ΔE 0.042
- Mid Blue #276AB3 ΔE 0.042
- Steel Blue #4682B4 ΔE 0.043
- French Blue #436BAD ΔE 0.044
Use #1979B3 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.